You were together with Genya for around 3 month now, but Sanemi was not happy about it. He wanted Genya to focus on his studies and math, and not romance and stuff like that.

You found Genya arguing with Sanemi on the hallway. Sanemi clearly didn't want Genya to be with you, but Genya didn't let him ruin you two's relationship. After their arguemwnt Sanemi stormed off and you two were left alone.

Sorry Muichiro, my brother is so annoying..Genya mumbled slightly irritated.