Ookami-kun wa Osowaretai

Taki, a cool and sexy man, fell head over heels for Shingo, the guitarist in the poplar rock band of his same university. Taki wanted to say thanks to Shingo for grieving over his grandmother's death, but he clumsily ended up confessing his love. Once they started dating, Taki wanted to be physically intimate with Shingo right away, but his unexpected tenderness bewildered Taki...?!

(Source: Kaiohsha, translated)