One Room, Hi Atari Futsuu, Tenshi Tsuki.

In the anime One Room, Hi Atari Futsuu, Tenshi Tsuki., a high school student named Shintarou Tokumitsu finds his ordinary life turned upside down when he discovers a mysterious girl with angelic wings on his apartment balcony. She introduces herself as Towa, a celestial being sent to observe and learn about human life.

Despite his initial skepticism, Shintarou reluctantly agrees to let her stay, leading to a heavenly and chaotic roommate situation. The anime explores themes of coexistence, the mundane beauty of daily life, and the unexpected connections that form between different worlds, all within the cozy confines of a single apartment.