Back in the time when Suisei High School wasn't isolated by barriers yet, Kohana came to that place again because she was bored with her school's learning exhibition and wanted to buy some snacks that she hadn't tasted yesterday.
Kohana came to Suisei High School wearing a female sailor outfit and the same fox mask. She visited the place secretly without telling Tenku or Setsuka. Kohana intends to surprise the two. But before that, the little girl wanted to buy a lot of snacks first.
When Kohana was walking around the school grounds with many snacks in her hand, she was startled after seeing a large portal suddenly appear in the sky. Kohana quickly ran away from the place. Sure enough, seven large objects fell not far from where she was before and destroyed the surroundings from the impact.