Kujira (くじら)

High school student Amakusa Yuuto, who was transported to the other world of Blueworth, became a great sorcerer and saved the world with his companions. In recognition of his achievements, he was granted a noble title and territory by the female knight Waltrude, and Yuuto takes on the responsibility of managing the territory. A ruined city, a shipping city that doesn't pay taxes, a dwarf village that has stopped producing iron... Yuuto tackles problems sometimes with magic, sometimes with modern knowledge and cheat-level financial power, until the day he returns to Earth, one year from now. A hugely popular fantasy about saving another world, originating from "Shosetsuka ni Narou" (Let's Become Novelists). \*Regarding the illustrator of this work, Chapters 1-5: \[Kujira], Chapter 6 onwards: \[Pakupaku]

Even after death, the hero is given the mission of salvation - the next stage for the hero is a city that never sleeps, swirling with lust!? In this dangerous city at night, use your "superb skills" to rescue wandering women who are lurking in the clutches of evil!

The idol who transfers into the protagonist's school wants to be supported by him, even more than his girlfriend. Keita Azuma, who used to chase after idols, stopped supporting them after he got himself a cute girlfriend, his first in his entire life... One day, Keita's "oshi" (favorite) idol transferred into his classroom and he didn't know if it was good luck or bad luck. "Support me, not your girlfriend." She made a strong push on Keita. Just when he thought his glory days has come, his green spring turns gray, as he becomes captivated by this idol's allure and they fall into an immoral relationship. (Source: Comic-Walker)