 If you liked
Slime Life
|
 ...then you might like
Kubo-san wa Mob wo Yurusanai
|
Despite being of nigh entirely different genres, both Slime Life and Kubo-san wa Mob wo Yurusanai start with a girl, a dark elf black magician and a dense high schooler respectively, taking interest in and teasing a guy, a child slime and a dense high schooler respectively. In both manga it starts almost as bullying but soon mellows out and the girl's affection is revealed and comes through. Afterwards, both pairs slowly start developing their relationships and recognise their feelings and responsibilities.
Also, both girls are extremely adorable.