What are the common themes in 'one shot manga love story'?

"Enjoy the extra wild taste of these sexy beasts!" #Beastmen #Reverse Harem #Transmigration #2019+2020 Female Lead No.1 【Update: Tue Fri】As soon as she fell into the world of beastmen, a leopard forcibly took her back to his home. Indeed, Bai QingQing is at a complete and utter loss. The males in this world are all handsome beyond compare, while the women are all so horrid that even the gods shudder at their sight. As a first-rate girl from the modern world (she's even a quarter Russian) Bai QingQing finds herself sitting at the center of a harem filled with beautiful men -- at the very peak of existence. -- This is an authorized work from Webnovel Comics protected by copyright law(Both original and translated version). All forms of reproduction/distribution are strongly prohibited.

"Don't touch me when we're out in public." "Don't openly say that I am your wife." "Don't let people know that you and I live together." Lu Jinnian and An Hao were forced to marry as a result of their parents' arrangements. An Hao thought their marriage would be loveless and inescapable, so she gave Lu Jinnian three don'ts on their wedding night. Lu Jinnian looked at her, expressionless, and blinked his eyes. Can't touch her in public? He'll do it in secret. He can't say that she's his wife? He'll say that he's her husband. And as for the final don't... In an interview, he declared to the entire world: "Every night, I share a bed with An Hao."

"The world overturns as demons arrive..." #Eastern Fantasy #WeaktoStrong #2020 Male Lead No.2 【Update Mon Wed】A warp in space-time occured because of the Space-Time Demon Spirit Book, and Ni Li, who should have died in an ambush by God-rank Demon Beasts, awoke to find himself sitting in a classroom. He had returned to his 13-year-oid self. Everything had been reset. How will he protect his true love now?

"Ahhhhh! My worldview was shattered overnight!" #Cultivation #Urban #HilariousAdventure 【Update Wed Fri】One day, Song Shuhang accidentally joined an online chat group filled with Xianxia-obsessed chuunis. They called each other "fellow daoists", had all sorts of strange usernames, and even referred to one their pets as a "demon dog". Some time later, however, Shuhang came to a realization. The other members of the group were actually real-life cultivators—the kind that move mountains and can live for thousands of years! -- This is an authorized work from Webnovel Comics protected by copyright law(Both original and translated version). All forms of reproduction/distribution are strongly prohibited.

In this world where Hunters with various magical powers battle monsters from invading the defenceless humanity, Sung Jin-Woo was the weakest of all the Hunters, barely able to make a living. However, a mysterious System grants him the power of the ‘Player’, setting him on a course for an incredible and often times perilous Journey. Follow Sung Jin-Woo as he embarks on an adventure to become an unparalleled existence through his “Level-Up” system - the only one in the entire world! ------ THIS IS AN OFFICIAL LICENSED TRANSLATION FROM D&C MEDIA Copyright Owner's Information: © DUBU (REDICE STUDIO), Chugong, h-goon 2018  / D&C MEDIA

What a surprise! Lin Huanhuan traveled to another world when she had a bath. In this world, there are cute male beasts in hide skirts with long legs everywhere! And these beasts want to be her mates! Usually love with another race wouldn't end well. But fortunately, she has got a system of existence in this world of beasts in her mind, through which she learns to live. Learn and live! There are many other things aside from having sex!