Nise Moteo ni Renai Shinan wa Ni ga Omoi

Hodaka Yuma, who has frequently transferred schools, struggles to form lasting friendships. Determined not to be forgotten after transferring, he decides to create a bold persona to stand out. Currently, Hodaka acts as a popular playboy with girlfriends scattered across the country, perfectly complementing his princely appearance. This act makes him the center of attention. However, in reality, Hodaka is an innocent boy who has never even kissed anyone. One day, the arrival of a new transfer student, Someya Masaya throws Hodaka’s carefully crafted persona into turmoil. Feeling threatened by the attention Someya receives, Hodaka is surprised when Someya asks him for advice on winning over someone he likes. But the "practice techniques" Someya suggests—like kissing and licking his chest—leave Hodaka flustered and confused…!

(Source: Kadokawa, translated)

Note: Includes an extra.