From Yes_Rhade:

Chapter 1:
Aizawa suddenly kisses his best friend Tsuji, who is now confused and worried that if these feelings develop, their friendship will be over. So to maintain their friendship, Tsuji attempts to get Aizawa and an old girlfriend to reunite their relationship. Nothing can go wrong with that plan, right?

Chapter 2:
Aizawa and Tsuji have finally slept together, but now what are they? Aizawa questions their relationship and if they are lovers or friends or where their relationship stands after their bedroom activities.

Chapter 3:
Tsuji is trying to come to terms with his new, more intimate relationship with Aizawa. Tsuji and Aizawa have been friends since high school, and Tsuji is wondering if being lovers will jeopardize their friendship. And if it's even worth taking a chance. A great bedroom line - "Bring it on." and a hilarious extra where Tsuji worries about Aizawa's "size".