At Kokuyo High

A little fanart of Mukuro and Chrome ^^
Now that I've finished my exams, I'll be able to post more drawings I hope
This work is a watercolor, but this time I tried to ink it... but I don't really like how it came out! The lines are too thick compared to manga line art. Anyone has some good tips ?

Katekyo Hitman Reborn ©Akira Amano.