Necessary and Sufficient Conditions

One day, struggling under the crushing weight of private loan debts and his father's hospital bills, Yeonwoo receives a single favor from an older brother figure whom he considers his savior. It is to take charge of the pheromone treatment for the dominant alpha, Kwon Tae-joo.

“...Could we add one more clause to the contract?”
“Go ahead and tell me.”
“...Party A shall not make any sexual contact whatsoever with Party B.”

Thus begins a one-month cohabitation. Contrary to the worry that it would be uncomfortable, Kwon Tae-joo turns out to be only sweet and mature.

Even though he is supposed to return to his place once the contract period ends, Yeonwoo finds himself growing accustomed to the dreamlike comfort gifted by him. And as the pheromone treatments repeat, a strange current begins to stir... (Source: RIDI, translated)

Original Novel:
Volumes: RIDI, Bomtoon, MrBlue, Bookcube
Chapters: Bomtoon, MrBlue, KakaoPage, Joara

Original Webtoon:
R19, R15