18+ Watashi no Kouguchi-sensei

Ruri Kouguchi, a skilled yet socially awkward male manga artist, has built a career creating niche loli manga. His carefully structured life takes a chaotic turn when Karen Shiina, an energetic young woman claiming to be a university student, joins him as his assistant. While Karen appears eager to learn, she harbors a mysterious secret and ulterior motives for working with Kouguchi. As they navigate the creative challenges of manga production, their quirky relationship evolves, blending humor, tension, and unexpected revelations.

(Source: MangaDex)