1x1 - The Angel Next Door Spoils Me Rotten

Amane Fujimiya, a socially awkward first-year high school student living alone, encounters his beautiful neighbor Mahiru Shiina, who is often referred to as an "angel" by their peers. After lending her his umbrella during a rainstorm, Amane catches a cold, prompting Mahiru to care for him, leading to the development of their unique relationship.