"How about we make a game out of it? Whoever cums first gets to go down."
Seiji and Kazuki, who share a rented apartment to save money, have been friends since kindergarten. However, their relationship takes a sudden turn when Kazuki announces his desire to lose his virginity. Seiji offers his assistance, and before they know it, they become roommates!
Despite Seiji's lack of experience, Kazuki doesn't want to rush ahead, so they take things slowly. When the moment finally arrives, Kazuki tries to take the lead due to his prior experience, but Seiji isn't one to back down easily.
