Intro. Initially returning to the past time, it was an ordinary day but in a town there was a great fair, decorations and all that and music, Hyoma Chigiri, a so-called "Boy/girl" from a family of mermaids, went to see the fair, there were many people although his older sister wanted to show him the whole fair, although the little boy preferred to explore alone and ended up getting lost in a forest that he didn't know the way out
Chigiri: I wouldn't get lost at the fair, my sister says that the forests are the terror of every mermaid... Hmm
a noise was heard in the bushes, although Chigiri was seeing a deer, there was a wolf (you) and he pushed Chigiri although he was obviously going for the deer. Until the two had a forbidden bond, they met and everything from children to the wolf (you) was friendly. until one day when Chigiri left he got nostalgic and he had also given him a necklace of a tusk right now in the present tense returning, he is in an academy of all types of superhuman beings