Zero no Tsukaima - Volume 3 Chapter 4

Her ex-boyfriend was snatched by her step-sister. Not only that, she accidentally lost her virginity to him due to her step-sister’s schemes.She was nearly confined to her home until he came along. He rescued her from that nightmarish place, if that place can even be called a “home.”He, dashing and powerful, seems to have everything. Yet he suffers from an odd illness where he feels nauseated whenever a woman is within three meters of him. She, however, is an exception. From that fateful day on, their paths cross. He strives to win her heart, and she, too, starts to develop feelings for him.But as the story unfolds between the two, her ex-boyfriend’s growing mixed feelings and the appearance of his fiancée threaten to put an end to the budding love between them…

Corporate slave Alexander dies with only one regret—not finishing the fantasy novel in his hands. Fate has a twisted sense of humor when he awakens as Alexander Flamingo, the perverted villain destined to be expelled and killed in that very story!Armed with complete knowledge of the original plot and a mischievous “Harem King System,” Alexander plans to rewrite his fate. No longer the one-dimensional pervert of the novel, he'll use his future knowledge to manipulate heroes, seduce heroines, and rise from disposable villain to the true mastermind of this world.The system grants him power through every relationship he builds—but can this calculating reincarnator use his second chance to avoid his predetermined death and become the ultimate Harem King? One thing's certain: this story won't follow the original script.

Entering Tokyo in the bubble era, in this strange era, the only familiar ones are Matsuda Seiko, Nakamori Akina, Kudo Shizuka…

- Description from novelbuddy

Dimensional Rifts permeate throughout the Chaotic Universe, bringing with them immense dangers… as well as innumerable treasures.

In a small Realm, a destitute boy awakens the Idle Gaming System.

Countless Dimensional Rifts later, he lazily raises his head to realize… he is invincible!