ワンルーム、日当たり普通、天使つき。

Tokumitsu Shintaro is a typical high school boy living alone in a modest apartment when he encounters Towa, a gentle and pure-hearted girl who appears on his balcony one day, claiming to be an angel sent to learn about humans. Despite his initial skepticism, Shintaro lets her stay, and their sweet, innocent cohabitation begins. As they navigate daily life, their bond deepens, but the arrival of other quirky characters—like a snow spirit classmate and a vampire with a flair for drama—adds chaos and charm to their routine. (Unreviewed summary by Grok 2)