Watashi ni Tenshi ga Maiorita!

Wataten! an Angel Flew Down to Me centers on Miyako Hoshino, a shy college student who would rather stay in her room sewing cosplay outfits than deal with other people. Her quiet routine is upended when her fifth-grade sister Hinata brings home her classmate Hana Shirosaki, and Miyako is instantly captivated by Hana's cuteness and angelic presence. What follows is a string of awkward but sincere attempts to win Hana over. Miyako tries everything from persuading Hana to wear cosplay dresses to offering her sweets, but those gestures only leave Hana with a bad first impression at the start. Even so, Miyako refuses to back off, convinced that she has found the angel who has descended before her, and keeps doing everything she can to grow closer without driving Hana away. The series plays out as a playful, character-driven slice of life built on Miyako's nervous enthusiasm, Hana's cautious reactions, and the comedy that grows from their mismatched first impressions. As their relationship slowly warms, the story stays close to small everyday moments, cosplay antics, and the awkward charm of Miyako's persistent desire to get closer without scaring Hana away. Around them, the ensemble keeps the tone light and affectionate, turning ordinary hangouts into a steady stream of small misunderstandings, gentle bonds, and easygoing humor.