Mariko tries to warn Tomoko off Nanako again, but Kaoru comes by and stops her. Fukiko invites Aya to the Sorority House and threatens her to stop bullying Nanako. Mariko invites Nanako to her birthday party - it is in a grand hotel room, but the only guests are Mariko's mother and Nanako. They return to Mariko's house, and Mariko and Nanako take a bath together. Mariko then tries to convince Nanako to stay overnight, but Nanako refuses because she'd promised her mother to be home. Mariko becomes upset and threatens to kill Nanako, causing Mariko's mother to restrain her as Nanako runs home.