Danshi Koukousei, Hajimete no 4th season

This manga follows three sets of high school students. 1. Aoi, the class president, is caught out in his unrequited love for an international student, Nanao, and his twisted heart, is sweetly melted... 2. Esumi tries to give up his love for pianist Yakumo, but when Yakumo touches his fingers, he feels good...? 3. The bossy idol Hibiki provokes the nerdy senior Kuze, and he himself gets aroused while at it... ♥ (Source: Libre, translated)

*Note: Volumes 1 to 3 are titled with "はじめての (Hajimete no)".*