Frustrated with his father and his homelife, Hero runs away from home to attend school in a town where his aunt lives. There, he meets Pop, and the two experience a rocky start in their relationship.

Hero finds ways to make amends with Pop, including protecting him from a school bully.

Hero turns the crisis of his father‘s financial cut-off into an opportunity to stay in the same community as Poppy. However, Hero's attachment to Poppy, irritates his girlfriend, Lala, who follows him and tries to pull him back with an unexpected plan, altering the relationship between Lala, Hero, and Poppy forever.

Hero creates an opportunity to stay at Poppy's house, displaying behavior that makes Poppy question whether they are friends or something more. Hero sticks close, overly protective, and nosy with issues of sexual education. However, the relationship shatters when they discover their parents are getting married, hurting both of them deeply.

Hero initiates a mission to win Poppy back. Although Poppy forgives him, Hero's confession of love causes Poppy to withdraw. Only, who usually garners attention from many girls, but ignores them, wants Tigger to notice him and resorts to teasing. Meanwhile, Poppy must accept his father's love for a new family, with her promising to provide enough love to make up for it.

Tiger, inexperienced in love, tries to shake off Only's teasing. Meanwhile, Hero's love brings simple daily happiness to Poppy, but complications arise when Pailin, Poppy's ex-girlfriend, returns to reclaim old times. Jealous Hero makes a mistake, creating a gap for Pailin to come between them.

Hero is uneasy, fearing he will lose Poppy for good when Poppy confronts him about sending someone to hurt Pailin. They part ways despite still thinking of each other. Eventually, Hero reveals the truth about what happened with Pailin. Poppy faces a difficult choice between two people who both love him dearly.

Pop discovers why Hero doesn't want to pursue a military career, despite pressure from his father. Meanwhile, Tiger, who has always wanted to be recognized as a real man, ends up deciding to dress as a woman. He seeks to prove himself through a sports competition, even though his body is not up to par. On the other hand, Pop has to deal with Hero's intense jealousy.

Just as their love ignites, Hero is taken abroad by Seal separating him from Poppy. Only falls for Poppy but ends up heartbroken when Hero returns to claim his love. The situation worsens when Hero's authoritarian father discovers their relationship and forces Hero to choose between love and life.

Hero's father tries to force him apart from Pop. Hero and Pop are forced to confront the past details of their parents relationships.