After ten years, cousins Ken and Tomo—now with a matured body—reunite during the holidays. They hit it off and commit the forbidden act, but little do they realize that it was observed by Ken's devilish little sister, and the lengths that she'll go to to prevent their love from blooming further...

After graduating high school, Kenji decides to return to his hometown in the countryside in hopes of finding out why Tomo had left without a trace nearly a year ago. But much to his surprise, Tomo seems to be doing well despite hints of something darker lying beneath the surface. But as all things tend to happen in the summer, Kenji takes the plunge and confesses his feelings to Tomo -- a reply that she had been waiting to hear since she first confessed to him as children.

It's been two years since Kenji confessed his feelings to Tomo before returning to the city, and now Tomo decides to surprise him by visiting him a day early, just before Christmas. Upon arriving at his flat, however, she's greeted by a familiar looking girl who claims to be his "new girlfriend". Just what's going on? Note: Although this was supposed to be the final chapter to this series, Ichinomiya Yuu is planning to release a follow-up "after story" as two separate works some time after the next comic market. The two stories will feature separate NTR and pure love endings.

Tomo decides to stay with Kenji in the city as he works part-time whilst attending college. One day, Kenji's stepfather, Takaaki, appears before Tomo once more and threatens legal actions against her now live-in partner. In exchange for not bringing Kenji to court, Takaaki forces Tomo into a sexual relationship, which eventually devolves into her falling for her would-be oppressor.

Kenji decides to stay with Tomo at their family home in the countryside in order to protect her after the events that happened with his stepfather. Working as a farm aide, Kenji finds it difficult to open up to Tomo, especially after noticing that she has been acting cold towards him. There's also the fact that they both don't know how to open up their relationship to her parents. Will the two have the happy ending they've always hoped for...?