Responses

The man is Eno of course
I hope Karino will kick his ass
I heard the next season ( chapters 20-25) will involve a school trip

I'm not sure if it's Eno... That would be too easy

Since they are going on a trip it can be so many people
https://www.facebook.com/1760202377623833/posts/2092966797680721/
https://www.facebook.com/1760202377623833/posts/2093966030914131/
First link is an extra paper and second link is a dialogue from the cover which says "A man will appear that will cause a storm and Karino and Azusa's relationship will change enormously". Spanish speakers please help to verify if I'm accurate in the translation :")