BL Threesome

Under law, omegas are obligated to wear a chastity belt. A rumor is going around that there's a key that will unlock the belt, people are fighting to get this key.

Sashima is the toughest delinquent around and is the leader of a delinquent group along with his right hand man Taketora.
Aoda, leader of another delinquent group hears of Sashima and decided to size him up only to discover he is an omega! Aoda quickly decides he wants Sashima as his and Taketora wants in too

Yuuzen, Kouetsu, & Ginga have been best friends since preschool, and they're at the top of the pecking order at a prestigious academy for only the most elite alphas. With their good looks, money, and academic prowess, they enjoy life on easy mode... at least, until one day, Yuuzen shows symptoms of being an omega! Unable to resist Yuuzen's pheromones despite the medicine they take, Kouetsu and Ginga give in to their instincts.