Heaven's Lost Property (2009)

S1E2 Heavenly Romance

Sohara is feeling upset after mistakenly witnessing Sakurai with Ikaros, leading her to jump to conclusions. In a hurry, Ikaros rushes after her and ends up accompanying her to school. Meanwhile, a card gifted to Sakurai by Ikaros emits a mysterious glow, causing Sohara's panties to unexpectedly fly off into the air. Before long, the chaos spreads, and soon, all the girls at school find their panties soaring high into the sky!