Isn't Our Prince Necessary summary:

Haruka was always weak as a child, unable to normally attend school. Nevertheless, he dreamed of going to school as a regular person, and his wish finally came true. As a result, he is a rare specimen, innocent in the ways of the world, giving him the nickname of "Prince". Follow him in his new school life as he makes friends and befriends one friend, Ryouhei, a little more specially. This is a cute, innocent story.