Hello, looking for three different hentai manga and any help or leads would be greatly appreciated.

The first one is a Tentacle/Living Clothes manga. A female researcher/scientist manages to create/invent "Chimeras" and would be a profitable breakthrough. However, she treated her male subordinates badly, and of course, the subordinates drug her and uses the Chimera/tentacles on her.

The second one is sort of a School Girl Chikan - A girl is stalked by a creepy classmate who always take the same bus/train home with her. The girl always fall asleep on the train/bus is trained/molested by the stalker classmate.

The third one involves a couple having sex and letting their female friend watch. The female friend gets turned on and later tries to seduce the male friend. However the male friend doesn't cheat all the way, (just anal I think?) and the female friend turns into a huge slut and fks everyone back at school.

Again, thanks for any help or leads!