Demon Slayer

Although he liked the Demon Slayer anime and manga, Banjiro wasn't fully in love with the Demon Slayer world, so as he entered as Tanjiro, he changed a few things using inspirational material from doujins like:

(He liked big, strong, fertile Nezuko from these): - https://hitomi.la/reader/2508317.html#2

• https://hitomi.la/reader/3293238.html#3
• https://hitomi.la/reader/3241163.html#1

(He liked submissive-mommy Muzan from these):

• https://www.rule34.world/post/1138712
• https://rule34vault.com/post/1014495
• https://rule34vault.com/post/481238

(He also made Mitsuri Kanroji into twins, one as a mature milf and one as a STACKED Mitsuri Kanroji (more than usual), but that was a little thing in comparison to the other girls)

With these changes made, he entered the world of Demon Slayer and got to work