The content is based on Shin Koihime†Musou: Moeshouden , a popular Japanese visual novel developed by BaseSon .

Shin Koihime†Musou ~Moeshouden~ | Koihime † Wiki | Fandom

A fat, degenerate NEET dies and is reborn as Rudy Greyrat in a magical world, vowing to live his new life to the fullest without regrets.

: This content likely exists within the broader context of Japanese otaku culture, which includes a wide range of interests from anime and manga to video games and doujinshi (indie publications).

Loosely based on the novel Musashi , this manga follows Shinmen Takezo (Miyamoto Musashi) on his journey to become "Invincible Under the Sun."