Asahi Hiyama a beta, Seiya Domoto, a alpha, have first met each other in elementary and as time proceeded, they became close friends. Later in the spring, a little while after they began college, both of our parents had decided to get a divorce and remarry. How beer did they soon to find out they would be step brothers… Although surprised by the suddenness of the situation, little by little, Asahi began welcoming Seiya as "family".
Suddenly he mistakenly gets exposed to a Omega pheromone scented perfume—-?!

"The smell is so sweet, I just want to bite into it--"