The main character is confessed to by his classmate Sakura.
He was very happy with her being his first girlfriend, but
When Touka, his estranged childhood friend, talks to him, he is invited to her house for the first time in a while.
Touka asks him, saying that Sakura consulted her about her worries about her boyfriend cheating on her.
“Hey… can you say you’ll never cheat on me?”
Although she declares that she will never do it,
As soon as he realizes that he can’t answer the extent of the affair, he feels uneasy.
Touka offers to help him and makes a proposal.
“You just have to try the act and decide for yourself.
If you think, “This is cheating,” then you just don’t do it.”
At the urging of her childhood friend
A cheating laboratory for two people to prevent cheating has begun.
