Does anyone of you know the title of this yaoi manga?

From what I remember, the uke likes the seme so they had a relationship (?). Actually i don't remember f they were going out but they were definitely having sex. At first, the seme didn't love the uke, he just uses him for sexual satisfaction and for money (?). Fast forward, they both went to a vacation and fell in love. Uke lied to his mentally unstable mom that he was on a tutoring camp. Mom discovered because of the dirt on his shoes and strangled him while sleeping.