i decided to write new fanfic... of course CL will be the lead but im confused with the male lead I want someone kpop idol from other fandom and someone from YG

the story is about weird college girl. She lived alone in the rent home. When she got there she accidentally save big unnie's life so her name become known. but then after the accident she got gossiped that she was lesbian with Bom You know i'm not trying to write yuri fanfic but well i tell you my idea that stuck in my head..anyway lets back to the story.. because now she famous she get along with the boys too..and sadly meeting with her long-lost-ex-boyfriend..when she already crush with someone who friend with his ex. i want have a shocking character here....like character with a lot of mistery...who will make Chaerin felt burden. SO i think i will write four-some relationship here LOL...give me advice please haha