Toyomoto, a college student, has a crush on his best friend: Otani. Perhaps because his love is too strong, he begins to imagine a love exchange with Otani. Little by little, climbing, illusions of kisses, and naughty stuff! But... a girl as good as Otani appears ?!

Note: The chapter count includes three one-shots:

- Hello Strawberry (ハローストロベリー)
- Natsunoowari wa mada (夏の終わりはまだ)
- Kidzukanakatta koto (気づかなかったコト)