I pray for threesome. God please. (▰˘◡˘▰)
It won't happen. The pairs, particularly the main one is fiercely loyal to each other, well it's Cain whose very fiercely loyal and possessive to his partner.
However, there is actually a special chapter which is non canon where a threesome happens. There's sadly no penis penetration though but still, it's very hot. The uke there was veeery lucky.










It's obvious duh. LOVEY DOVEY MOMENT! DATE!!!! (๑•ㅂ•)و✧