A high school girl returns to her apartment complex and notices five small boys sitting around a black, shadow-like mass in the courtyard, whom they personify as their friend, "Tomonari-kun." They claim that "Tomonari" invites her to play with them, but she declines and promises to play with "Tomonari" soon. The next day, they invite her again, but she uses her part-time job as an excuse. When she returns home, the girl finds the boys knocking at her door, who claim that "Tomonari" spoke of visiting her and point to a black shadow on her ceiling, claiming it to be "Tomonari". Spooked, the girl throws the boys out and watches in fear as the black shadow manifests eyes and speaks of her promise, before it pulls the girl into itself. Finally the boys look on and seem to be happy for "Tomonari" before sitting around two shadows in the courtyard.