Kosuke and Sana, who met at university, exchanged their first experiences and eventually became friends with benefits.
Both disliked romance, so their relationship was purely for satisfying desires.
However, during sex, Sana—who was supposed to be expressionless and cool—began to show cuter and cuter reactions.
Kosuke fell for this changed version of Sana and started to truly like her.
Then, to split rent, Sana invited him to move into a new apartment together.
But his roommate turned out to be not only Sana, but also her busty older sister, Aira, who worked as a hostess.
Whenever Kosuke had sex with Sana, Aira would always intrude, pressing her pussy against him and making him lick it.
Unable to see Sana’s cute reactions anymore, Kosuke began to wonder why Aira was interfering.
There’s only ever one truth.
“—Could it be that her sister actually likes me…?”
No way… Or maybe yes!?
And so begins a harem romantic comedy where everyone ends up happy.
