Kikazaru Hina wa Mada Koi wo Shiranai

The story revolves around protagonist, Keita Hinami, who is socially awkward and an otaku. Keita secretly engages in crossdressing cosplay, and during his first event, he coincidentally encounters his popular classmate, Satoru Urushibara!

Keita's crossdressing hobby gets exposed to his classmates, causing him to feel despair. However, Urushibara surprises him by saying, "Can you spare a moment?" and leads Keita to the restroom... To Keita's amazement, Urushibara not only accepts his crossdressing but also helps adjust his cosplay outfit and even applies makeup for him! It turns out Urushibara has an older sister who is experienced in costume making and makeup, making him not only handsome but also skilled in cosmetics. This encounter brings significant changes to Keita's previously friendless and mundane life.

(Source: Libre, translated)