Sono Kareshi, Kikan Gentei Nitsuki

Chitose Yuzumoto is surprised when Riku Hidaka, the former baseball team captain, arrives at the library instead of the girl he expected. Riku proposes a two-week relationship to help him create memories during his final year of high school. They begin spending time together as if they are close friends, but Chitose gradually becomes aware of growing emotions within himself.