Boku wa Kimi ni Kamaretai

Koharukawa is a BL manga artist working under the pen name Kanade Ooharu. At his class reunion, Koharukawa reunites with his first love, Akina, who tells Koharukawa that he would do anything for Kanade Ooharu's autograph. Without thinking, Koharukawa asks the other to bite his neck...?

(Source: Takeshobo, translated)