Otonari no Tenshi-sama ni Itsunomanika Dame Ningen ni Sareteita Ken

Amane Fujimiya is the neighbor of Mahiru Shiina, a student known for her angelic beauty and excellent grades. Amane is an ordinary student who has never really spoken to her.

One day, on his way home from school, he meets Shiina who returns his umbrella to him, telling him that his apartment is dirty and that he should tidy it up. Thus begins a relationship between a sharp-tongued angel and an ordinary student.