KOISURU KAICHOU WA MENDOKUSAI

Suou is the perfect student council president, handsome, academically gifted, and athletically talented—everyone admires him. However, he has a hidden side: his approach to the secretary, Nagi, is heavy and annoying! Despite Nagi's cold and dismissive responses, the president relentlessly pursues her. (Source: Kodansha, translated) — Description from AniList community (anilist.co).