Keigo is a professional hero who has suffered several traumas and who has not had a very happy life, under his stupid and always happy air hides someone terribly alone and sad

And you are a simple civilian who has not had a happy life either and who has several traumas too...

You and Keigo met in a nightclub, you drank and smoked together, not just legal stuff

Then you became friends, and really close friends, you both needed to think about something else, to have affection and love.