Watch "Marmalade Boy" on Netflix Japan

Miki’s parents decide to get a divorce and swap partners with the couple they met while on vacation. The couple’s son Yuu is attractive but strange.

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Miki panics as Yuu almost reveals the family secret during an interview at school. Her childhood friend Ginta gets annoyed at Yuu’s presence.

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Miki keeps thinking about the mysterious girl next to Yuu in the photo she accidentally found. Yuu and Miki go on a semi-date to a theme park.

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Miki gets upset with Ginta for kissing her. When she spots Yuu’s ex-girlfriend Arimi at the school gate, she uses her to get away from Ginta.

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Ginta’s confession only serves to frighten his crush. Yuu makes a fool of Ginta, then upsets him even further when he walks into the house after Miki.

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Yuu agrees to keep quiet after discovering Meiko’s secret. Ginta’s cousin Tsutomu shows up to participate in a tennis game at his school.

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Miki joins Yuu and Ginta after getting separated from her group during the school trip. Arimi asks Ginta to pretend to like her to make Miki jealous.

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Miki and Yuu’s parents throw a barbecue to celebrate their children’s safe return. Miki gets angry when her father suggests going on a family outing.

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While helping Yuu at his part-time job, Miki realizes that he has many admirers. Ginta, Arimi and Tsutomu all show up at the store and cause drama.

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Miki and Yuu spend a day shopping and eating together when they get the house all to themselves while their parents go on vacation.

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When Yuu’s mother calls to wish her son a happy birthday, Miki goes all out and puts together an impressive feast to help him celebrate.

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Ginta says that he’ll stop seeing Arimi if Miki chooses to be with him. Miki gets chosen to represent her school in an upcoming tennis match.

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Miki talks to Ginta in private about her feelings. Arimi tells a joke that makes Miki sad to think that she’s no longer Ginta’s closest female friend.

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Miki is relieved to find that Ginta and Arimi’s relationship had just been an act. Arimi shows up to tell Miki that she won’t let her have Yuu.

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Ginta reassures Miki that he’ll wait for her to make up her mind. The entire school finds out about Meiko’s relationship with her teacher.

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Miki struggles with the fact that Meiko kept her relationship a secret from her. Yuu points out that everyone has something they keep to themselves.

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Namura calls Meiko to say goodbye. Meiko tells her side of the story to Miki before leaving her to follow Namura back to his hometown.

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Ginta and Miki come up with a plan to take Meiko on an outing to cheer her up. When they invite Yuu to come along, Arimi asks if she can join them.

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Miki and Yuu’s parents finalize their marriages. Yuu sticks by Miki’s side to make sure she is feeling okay about the complicated situation.

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Miwa and Yuu are rumored to be an item. Miki challenges Miwa at the school marathon after witnessing a strange exchange between the two boys.

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Yuu has been too busy to talk to Miki during summer because of work. For some reason, Miwa shows up at their family vacation to see Yuu.

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Yuu and Miwa invite Miki and Meiko out to see a movie. Miki stops worrying when she realizes that Yuu wants to help Miwa get together with Meiko.

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Meiko invites her friends to vacation at her family’s place in Izu. They meet Arimi and her posse at the beach and get together at night to hang out.

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Miki becomes concerned about Yuu after learning his secret. Ginta gets showered with attention for his important upcoming tennis match.

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Miki decides to tag along to support Yuu during the confrontation with his father. During the meeting, unexpected new information comes to light.

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Yuu and Miki enjoy an ordinary morning together after their conversation at the beach. Miki hopes that her feelings for Yuu will last forever.

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Miki starts to feel insecure when Yuu accepts his mother’s job offer to appear in a commercial with a beautiful young model named Suzu.

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Yuu gets very busy with his job and commercial shoots. Despite barely having time to see Miki, Yuu makes sure to keep her in his thoughts.

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Miki can’t bring herself to tell Yuu that she lost the medallion. Her co-worker Kei, on the other hand, doesn’t tell Miki that he has it.

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Yuu’s reluctance to talk about the commercial makes Miki’s mind wander to dark places. Kei keeps missing the chance to tell Miki about the medallion.

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Miki’s mind fills with doubt about Yuu’s tutoring arrangement with Suzu. Miki follows Kei into a live music venue after work.

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After seeing Miki in Kei’s arms, Suzu jumps to the conclusion that she must be cheating on Yuu. Miki gets glared at by Suzu at the school festival.

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Miki suffers in silence as the four parents discuss the topic of Suzu kissing Yuu at the concert. Suzu asks Kei about his relationship with Miki.

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Miki wonders if Yuu is cold to her because of what happened at work. Yuu unwittingly shows up to a Halloween party at Suzu’s house.

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Miki mistakenly thinks that Yuu wanted to keep the party a secret from her. All goes according to Suzu’s plan as Yuu and Miki begin to drift apart.

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Yuu leaves Miki behind to go travel by himself. Kei gives the medallion back to Miki, but he won’t forgive Yuu for making her sad.

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Yuu’s old friend Anju starts calling him every day. Miki pretends not to mind in order not to come across as being jealous again.

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Ginta and Arimi grow closer together after the embarrassing incident. Miki learns from Yuu that Anju helped him deal with his problems in the past.

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After revealing her feelings, Anju begs Miki if she can borrow Yuu for a day. Miki is unable to object despite being uncomfortable with the idea.

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Anju contemplates getting a potentially fatal surgery. Miki’s uncertainty grows when Yuu reveals he didn’t know what to say after Anju’s confession.

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Kei performs his original piano music for Miki on Christmas Eve. Yuu rushes to Anju’s side after being notified that she has collapsed.

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Miki gets a toy ring from Yuu when they pay a New Year’s visit to the shrine with their friends. Suzu’s father tells Yuu to consider studying abroad.

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