This fan fiction should only be considered as non-canon, it's irrelevant with the main story of Hajime Kamoshida. This fan fiction sets place in 27th June and onwards, which is during the beginning of "Seishun Buta Yarou wa Petit Devil Kouhai no Yume wo Minai". And yes, Koga's Puberty Syndrome won't appear in this story.
2 parts