Ayamachi wa Ai de Tsugunatte

"I don't want to pretend that night was just a mistake."

Natsuto, a popular college student who's liked by everyone, ends up crossing the line with his reserved best friend, Saku, in a drunken moment. Trying to forget what happened, Natsuto keeps his distance, only to unexpectedly run into Saku again at a group date he joined just to fill a spot. Then, when a girl hits on Natsuto, Saku suddenly declares that the two of them are dating...!? What starts as a "fake relationship" for just one week slowly begins to stir up their true feelings...

(Source: Libre, translated)

Note: Includes one extra chapter and the one-shot "Yoru yo, Bokura ni Mahou wo Kakete (夜よ、ぼくらに魔法をかけて)".