Meet Moe, Nana, Mai, Sayaka, Misuzu, Asuka and Yuna, the sexiest girls around, but they have a common problem to each other: They can’t get enough sex and get satisfied. They will do anything they can to accomplish their dreams and desires.

What anime do you recommend if I like the OP badass-while-calm main character?

Mob from Mob Psycho 100.
He's more ignorant and naive but extremely calm and badass.