In a park on a rainy evening, a 19-year-old university student, Fumi, offers an umbrella to a soaking wet 10-year-old girl, Sarasa. Realizing her reluctance to go home, Fumi lets her stay in his place, where she spends the next two months in peace. They take each other's hands and seem to have finally found their place in the world until Fumi is arrested for kidnapping. Fifteen years later, the lonely two are reunited both still suffering from the stigma as the victim and perpetrator of "a pedophile case". Will the society give a place to their unshakable bond they have formed?

Riko is 27, working as a love simulation game designer, and she no longer has big expectations for a man in her life. One day app company TIMEIS, lead by Soichiro, hires her to work on their latest game.