If you're looking for manga similar to Interspecies Reviewers, you might like these titles.
Kurimusubi Daisuke, a man fascinated by the complex zoology of monster girls in fiction, one day finds himself transported to a world full of them! When he encounters an arachne named Neya who needs his help, Daisuke rushes to help her–which begins his new life of meeting (and researching) the beautiful creatures around him. These monstrous ladies show him that he has a lot to learn, and Daisuke never dreamed he’d be able to satisfy his passion for monster girls like this!
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Both are Reviewing and Exploring Monster Girls.
Fantasy Ecchi contain S*x
Creature Girls: A Hands-On Field Journal in Another World
Long ago, the Chosen One defeated the Demon King and brought peace to the world not that it matters to ordinary high school student Hironori Tabata. But word is the Demon King’s coming back, and the only thing that can stop him is what’s in Hironori’s pants. Before long, demi-human girls are throwing themselves at him, hoping to give birth to the next Chosen One, and Hironori has to worry more about saving his chastity for the girl he loves than saving the world.
Ryugasaki-san is a lizardgirl. Her tongue is like that of a chameleon's, her hands are like that of a gecko's, and she even has a third eyelid! Due to her unique biological makeup, she sheds her skin multiple times a year. This wouldn't ordinarily be an issue, but she suddenly finds herself (or rather, her skin) the target of a classmate's affections. The peculiar Yugami-kun has a particular interest in reptiles, and Ryugasaki-san's unique physiological features have caught his inquisitive, meticulous eye. Thus begins the story of a budding romance between two very unusual individuals. With a bit of luck, Ryugasaki-san can show the hapless Yugami-kun that there's more to her than her reptilian anatomy!
One day, a boy who loves Insects, "Anri Kajimi," meets "Makiri Oka," an Insect girl (Konchuki) who came from 100 years into the future. Oka, who is a "Konchuki" who has the characteristics of a human being and a insect, presses him into "mating with her" ...
Shimano Yuuji is about to head to Osaka from Tokyo to get married, and his friends and co-workers have decided to spring for a hooker for him in a private compartment of the train he's traveling in as a "farewell to bachelorhood" present. The girl? She's 17, and new to the business, but certainly not inexperienced. It makes for an interesting trip. Thing is, this girl is going to show up again in Shimano's life in a most unexpected way!
Elf mage Frieren and her courageous fellow adventurers have defeated the Demon King and brought peace to the land. With the great struggle over, they all go their separate ways to live a quiet life. But as an elf, Frieren, nearly immortal, will long outlive the rest of her former party. How will she come to terms with the mortality of her friends? How can she find fulfillment in her own life, and can she learn to understand what life means to the humans around her? Frieren begins a new journey to find the answer.
In a world where humans and human-like beasts coexist, Yukari comes across an unconscious Shima in the streets. When Shima wakes, he finds himself in a warm bath, being washed by his savior, Yukari. Shima, prejudiced against humans, starts thinking maybe not all humans are bad until he sees Yukari's scar, the same scar of one of the humans that took Yuki away. Shima, desperate to find Yuki, barges into the underground shop Yukari owns that offers special services from beast to humans. Lo and behold, Yuki is there but is not wanting to go home as Shima imagined. Will Shima be able to return to his village empty-handed? Or will he have to stay in the shop and... work there?
The story of Fukumaden takes place in a world after the Demon King has been defeated by the hero. The hero makes a harem of women to pass down his blood, because the Demon King is fated to return in the next few hundred years. However, because he gathered too many girls, there are 100 women in waiting. The story depicts the women spending their time talking amongst each other as they wait for their turn to meet the hero.
Anne Halford is a candy crafter determined to follow in her mother's footsteps and become a Silver Sugar Master, a title bestowed only by royalty. In order to travel to the capital and realize her dream, she purchases Challe, a handsome but foul-mouthed fairy, as her bodyguard. Anne wishes to befriend her new companion, but in this kingdom where fairies are treated as property, Challe wants nothing to do with humans. Will this journey with Anne change his mind...?