Sky Link by Yamada Shiro

Summary

Plot: On the first day of school, university student, Ban Ritsuki, felt disgusted when a man who bumped into him told Ritsuki that he has the “type of face he likes”. However, that man was actually the lecturer, Takagi Shoutarou who, somehow after that day, kept clinging on to Ritsuki. Ritsuki gets more and more pissed off, until one day, he saw Takagi’s miserable expression while gazing up into the sky. Suddenly, he starts to care for Takagi…