GE: Good Ending

High school student Eiji is in love with Aki, the head of the tennis team, but he is unable to ask her out. Another student, Yuki, discovers his obsession with Aki, and promises to help him get closer to her… but Yuki’s help comes at a cost, and soon, the analytical, strategic Eiji finds himself deep in the messy turmoil of emotion...

(Source: Kodansha USA)