HELP!

i need help finding this bl manhwa i read. it was this college romance and the main character had light hair and he pretended to be experienced but in actuality hated touch (if im remembering correctly) and he promised this guy (the ml) to help him get experience (?) idk but the mc also had a sister that was kind of a bully to him and thats why he hates touch or something. if i remember correctly it kind of has the same plot line as "why are you so kind to everyone except me". ┗( T﹏T )┛