Wagahai wa "Otokonoko" de Aru!

A man in his late twenties, who is an avid reader of Shonen Jump, is determined to cross into a fictional two-dimensional world where cross-dressing male characters, known as "otokonoko," exist. Nanami Igarashi, the son of manga artist Yumiko Igarashi, has inherited his mother’s artistic traits and developed a strong otaku culture interest. While living with his cosplayer girlfriend, he secretly used her clothes and makeup to cross-dress when she was away. His secret was eventually uncovered by her.