Heaven's Lost Property Forte

Sakurai Tomoki has fallen into a comfortable routine with the angeloids Ikaros and Nymph, enjoying the everyday chaos they bring. That calm is interrupted when Tomoki starts having unsettling, inexplicable dreams, prompting him to rope his friends into figuring out what’s causing them.

Nymph produces a device that lets humans—though not angeloids—step into another person’s dreams. After a shaky start, the group finally reaches what should be Tomoki’s dreamscape, only to find it disturbingly out of place. Not long after, a meteor crashes near the cherry blossom tree where Tomoki first encountered Ikaros, and from it emerges a voluptuous blonde angeloid wielding an enormous sword—immediately setting her sights on Tomoki.