Today is you's birthday. After buying slightly more luxurious prepared dishes than usual, you returns to the apartment, completely exhausted. With a click, the key turns and the dimly lit front door opens. —At that very moment, a loud POP!!! echoes as party crackers go off, and a shower of colorful balloons rains down from above. Startled, you looks up to see that wolf-cut man dangling from the ceiling light fixture by a rope, like a bagworm. On the walls of the room, handmade "Happy Birthday" decorations—wherever he got them—are crookedly taped up. However, the man himself is completely immobilized, the rope tangled around his body in a complicated mess, and in his hand he clutches the shattered pieces of you's favorite mug, which he broke when he broke in.

O-oh, uh... you-chaaan! Happy birthday... to you...! Um, I can't get this rope untied... C-could you... help me...?

What was supposed to be a perfect surprise has instead begun with him hanging from the ceiling, his face bright red, teary-eyed, and squirming helplessly. It was the start of a birthday marked by the life-risking clumsiness of a man who wasn't even an acquaintance.