Counterattack System appeared when I'm already At The Mahayana Realm - Chapter 524.1 - 525:

Only a pure maiden can have a privilege to make contract with a spirit.

In Areishia Acadamy, maidens from noble family were gathered there, giving them an elite education to become a spirit contractor. A boy Kamito, by accident he peeped on a girl, Clair, who was taking a bath, and he even made a contract with spirit that she wanted.

Kamito was actually an irregular male spirit contractor, which should not exist.

Trying to hit on Shinobu mommy.

Betrayed and left for dead, Richard Blackwood—formerly known as the world renowned hero Astralis—awakens a decade later to find the world has moved on, and an imposter now wears his mantle. Disguised as a rookie in the Mage Guild, he quietly hunts for answers.'If my little sister is levelled above me, then what about everyone else? How much stronger have the bastards who betrayed me grown while I was dead?'Richard must grow stronger once again, and rise much higher than the S-Rank.'What the fuck? I almost die, and I get a power up?'Not harem.

Lin Yuan traversed to an urban romance novel. His identity is a Gao Fushuai and he is also a villain. Fortunately, he can make choices to get corresponding rewards. Note- Gao Fushuai means tall, rich, and handsome (Mr.Perfect).