
Necessary and Sufficient Condition
필요충분조건
art: 고럐; original novel: 토큐 (webtoon publisher 비러브드; novel publisher 텐시안)
Buried in loan-shark debt and his father's hospital bills, Yeonwoo agrees to treat a dominant alpha's pheromones, with a no-sex clause in the contract.
- Format
- webtoon
- Episodes
- 9 on Ridi, ongoing (6th/16th/26th)
- Age rating
- 19+ and revised edition (Ridibooks)
- Content note
- 19+ edition; omegaverse, mpreg
Not in English yet
Synopsis
Yeonwoo owes private lenders and can barely cover his father's medical bills. An older acquaintance who once helped him asks a favor: handle the pheromone treatment of Kwon Taeju, an alpha. Yeonwoo signs on for a month of living together and adds a clause banning any sexual contact. Taeju turns out kinder and more grown-up than he feared. As the month runs down, Yeonwoo has gotten used to feeling safe, and every session gets harder to call routine.
Where to read
Tropes
Similar titles

Be My Beta
Shin Yuri
Yoo-il's only friend hates omegas, so when Yoo-il presents as one in his twenties, he decides Cha Hwan must never find out.
Read on Lezhin →
Cohabitation Contract
SHINA SUZAKA
To protect a rescued cat, people-pleasing salesman Hayasaka lets convenience store worker Kumagai move in.
Read on MangaPlaza →
Contract Signed: Irreversible
이 계약은 파기할 수 없습니다
Unineo
A secretary who has loved his alpha boss for years helps arrange the man's engagement, then spends one rut-fueled night with him.
Read on Tappytoon →
Define the Relationship
디파인 더 릴레이션십
Flona (novel)
Told by his doctor to try sleeping with alphas, heir Karlyle Frost reconnects with Ash Jones, the alpha he kissed one New Year's Eve.
Buy from Publang →
Eat Me Up, My Husband
yukiharu
A married-life story about a younger husband with the energy of a puppy and the spouse who adores him.
Read on MangaPlaza →
Gold Gray
Lee Green
The world's last omega has spent his life in hiding, until he runs into the one man who needs him most.
Read on Lezhin →