Mother Parasite

Ryota Miki is a middle schooler who lives a happy life with his single mother. But his relationship with his mother is strange, as she is always afraid of causing the slightest trouble. Meanwhile, his classmate Kaoru Kasai is fed up with his overprotective mother, and feels that it's his mother's fault that he ended up bullied. But one day, Ryota starts talking to Kaoru for the first time after saving him from bullying... A psychological suspense thriller about a boy obsessed with finding the ultimate mother!

(Source: MangaHot)