Kabedon Kareshi ~Manatsu no Charaotoko~

At a beach resort with university friends, you meet Yuki Reo, a wealthy heir with a flashy demeanor. Popular with girls, he becomes interested in you because you don't respond to his advances at all. What started as half-joking turns into a change in his attitude when you point out his fake smile. [Translated From Ninten-Switch]