Ikai Hanazoushi(2006)

Ikai Hanazoushi

What will happen when a clumsy boy with spiritual abilities and the tsundere prince of spirits meet...?!
Chiyohiko is a high school student who's normally carefree and laid-back, but actually, he has very strong spiritual ability. Tamaharu is a prince of spirits who's normally cool, but actually, he's shy and has a "tsundere" personality. One day, while performing exorcism, the door to the spirit world opens, and Tamaharu appears...

(Source: Intercross)