Helpp me find the manga

https://www.mangago.me/read-manga/the_story_of_monster_and_asuka/ Listed as story of monster and Asuka. I recommend that if you can't find a manga here. (Likely due to an alternate name) that you enter it into Google and add mangago at the end of your query. I searched it up as "the story of Kai and Asuka mangago"   reply