In 16th century, Age of Discovery. A boy spent boring days on land and decided to go on a voyage. He became a brave Samurai with free spirits and finally became a the pirate called "EL-MALO". A Japanese Samurai commences his epic voyage.
After carefully considering his options numerous times, Makoto, a 30-year-old virgin, decides to go to a high-class adult shop so that he can climb "the stairway to adulthood". But there, he loses his footing on the stairs leading to the shop, slips, and ends up getting transmigrated into another world! In this world, the concepts of "virtue" and "ugliness" are the exact opposite from how they are on Earth, plus there's an extreme lack of men! At an adventurer's guild in the town he finds himself in, he's recommended the job of "cleric", which involves quelling "the curse of carnal desire" (horniness) from the female adventurers by performing a "ritual" (having sex with them)! Thus begins his never-ending, 24-hours a day test of endurance as he works to remove the "curse" from big-boobed elves, tomboy female knights, and lolis who have enormous breasts and talk like old men! Through his "ritual of love", will he be able to heal the emotionally-injured beauties who've been belittled and called "average-looking" by society?! Source: Shueisha
One day, Kaiusagi Shirahase, an idol in a popular boy band, is involved in a car accident on his way to a show at the dome arena. The scene changes to a medieval fantasy world. The heroine "Coco Nina" is on her way to the cathedral for her coming-of-age ceremony. Coco is ecstatic as she receives the blessings of the Goddess with the power to protect this world. However, that was when an unfamiliar memory rushes into her mind. I know this… I know this memory… I… I am Kaiusagi Shiranase! (Source: COMIC Isekai Harem, translated)