NAOE

I don't believe in eternal love, so all my love affairs were adulterous ones... and then I allowed a younger, single coworker make love to me...!?

Set in Tokyo it's described as a space action series between humans & extraterrestrials.

Though the daughter of a noble conglomerate family, Yuri was called a "weed" and treated with scorn and unfriendliness by her relatives because her father was an illegitimate child. Yuri accompanies her father over from Tokyo to the snowy north of Japan when he accepts a demotion. However, there she meets a man named Kaga, who has captivating and beautiful wolf-like eyes. The capable Kaga is the head of a local distinguished family and is also the vice president of the branch. Due to an arrangement he made, Yuri ended up working quietly in the secretarial office. It's been five years since then. Yuri's ill father has passed away, and she fears she'll be called back to Tokyo by her relatives. On a snowy night, she is called to the Kaga family mansion. There, Kaga suddenly suggests, "Do you have any interest in becoming my wife?" In a snow-covered town, a dramatic love story is about to begin.

This thrilling sci-fi fantasy series welcomes you to Japan, a top ten destination for extraterrestrials looking for refuge, relaxation, a good time, or just to raise a little hell! Join one unsuspecting Tokyoite as he discovers that intergalactic tourist relations can prove to be a lot more dangerous than they seem! Shiny new high school first-year Akira is as ordinary as they come. He's awkward, has terrible grades, and loves manga. In fact, the only thing that really sets him apart from his peers is his staunch determination to follow in his late father's footsteps as a police officer. But fate has its own plans for Akira. After witnessing a ferocious battle unfold between two strangers with unusual powers on the train—one of whom looks a lot like the tall, dark, and handsome kid in his grade—he finds himself kidnapped...by none other than an alien! And as if being thrust into the occasionally violent and always complicated relations between humans and aliens wasn't mind-boggling enough, nothing can prepare Akira for learning the truth about his beloved father...