Tonari no Masami-chan

A boy named Nobu is constantly accompanied by Masami, a ghost who has followed him for a long time. Nobu and Masami were lovers in a past life, and she has remained with him since his rebirth. Her presence causes others to avoid him, leading to complete isolation from his classmates and social interactions. Nobu has not spoken to anyone in years, and Masami’s constant presence is causing him significant distress. If he cannot find a way to be free of her soon, he risks losing his mind despite being surrounded by people in the city.