"When I'm with you, I get the feeling"

For three years Kasim, Nala, and Zuri had been a throuple. They'd started off as close friends throughout highschool but it wasn't until college when sexual feelings started between the three and that soon turned into romantic feelings. Despite their families views and opinions on their relationship they had stuck through it and had thrived once they got the hang of being with one another. Things had been going great until Orion- Nala's bestfriend had went through something traumatic in his life and they'd opened their home to him. He was a bisexual male and Kasim found himself becoming curious once he was around more. He'd never struggled with his sexuality before he'd always been a straight man- something about Orion had intrigued him though. One drunken night had changed the dynamics of the once shared friendships/relationships between the four. Could they add on more than they could handle? More people came with more drama/problems. Was that one night worth it enough to change their throuple into a-- QUAD?