花野井くんと恋の病 [Hananoi-kun to Koi no Yamai]

A gentle, slow-burn romance from Kōdansha, 花野井くんと恋の病 (Hananoi-kun to Koi no Yamai) follows a high school girl whose carefully guarded life is upended by the intense, almost obsessive affection of a mysterious classmate. Running for 18 issues from 2018 to 2025, this series explores the delicate boundary between devotion and control, offering a thoughtful, character-driven take on first love. The manga is best known for its nuanced emotional depth and the way it examines the quiet, sometimes unsettling weight of a partner’s all-consuming feelings.