https://www.cmoa.jp/title/303134/

title Sakura Shimizu (28), a high school teacher, is a very sadistic person, contrary to her plain appearance and serious and dignified demeanor. She was consumed with her fantasies of tying up and spanking...

Shiori's dad remarries and she couldn't be happier. Not only has she gained a new mom, but a hot, older, yet sadistic brother as well?! Note: The manga was previously named as Ie no Naka no S na Koto.

Oshikake Yakuza wa Amaku Hageshiku (押しかけヤクザは甘く激しく) by Megumi Kanzaki 2. Washi no Mon ni natto ose: Kekkon Zenya no Mitsugetsu (わしのモンになっとおせ 結婚前夜の蜜月) by Dai SasazukaHatsukoi no Higan: Imouto-bun wa mou yameta ...

Originally posted on Pixiv under the title Do S Obake no Tanjoubi o Iwaitai (I Want to Celebrate the Sadistic Ghost's Birthday) Officially published as a doujinshi under the title Do S Obake no Tanjoubi ni...

https://www.cmoa.jp/title/311725/