Guys in ch 16 yudai topped the professor lol https://jmanga.org/read/%E3%81%AE%E3%81%BFx%E3%81%97%E3%81%B0/ja/chapter-16-i1-raw/
professor's vibe totally different from current chapter lolol, being bashful and stuff Also aren't they in highschool currently? And that flashbacks means he's younger, and he's topping an adult (⊙_◎)?!
no way we got side characters action first before main couple
Guys in ch 16 yudai topped the professor lol
https://jmanga.org/read/%E3%81%AE%E3%81%BFx%E3%81%97%E3%81%B0/ja/chapter-16-i1-raw/