Collecting semen(sorry for this) . Looking for this 2 manga title

1. The one was typical harem manga, the story was about a sucubbuss princess who need to get sex with the male lead so she can get amazing power to rule/destroy the world. The mc looks like the MC from to love ru. The story was light comedy harem anyway

2. The story was dark. Only remember the first chapters. The mc was a high school girl and was a kinda class rep with glasses type. She was an honour student and was commended by his peer and teacher. She works hard anyway for it, and realized some people dislike her somewhat "good honour student" attitude. In the end when she wake up from bed, she have some weird dream(seems she got some accident before school and it haunts her). There's a mark of "bitch" on her tongue/forehead and she need to do something lewd or she will die.

Thanks guys 😀

The first one might be ore tama

Possible for first one is Princess Lucia.