Here are my favorite picks for anime like R-15. Keep in mind the list is in no particular order. Enjoy the recommendations!
The story centers around Akihisa Yoshii, the “baka” of the title. His academy rigidly divides up the student body into classes based on the results of tests. The prodigies are in the A class with reclining seats complete with air conditioning, but Akihisa is in F class, the lowest rung of the school ladder which is furnished only with low, decrepit tables and worn-out straw tatami mats. A girl named Mizuki Himeji is actually one of the smartest girls in Akihisa’s sophomore year, but she had a fever on test day and was pigeonholed into the F class. Besides Mizuki (who Akihisa secretly adores), the F class also has Yuuji Sakamoto, the class president who has been Akihisa’s friend and partner-in-crime since the freshman year.
The school happens to have developed experiments to summon fantasy creatures, and Akihisa decides to rally F class to take on the higher-tiered classes and seize their perks. The F class uses the summoned creatures in an all-out battle for school supremacy. (Source: MyAnimeList)
Based on the manga series by Hiromitsu Takeda, this romantic comedy is about Takeru Ohyama, a typical perverted teenage boy. His new school doesn’t require entrance exams, and it just turned co-ed! Unfortunately, his dreams of a happy high school life are dashed when he finds out the school is much more than it seems. All of the students wield a special item—a Maken—to unleash their magical abilities in duels! Can Takeru find a Maken that works for him? Even while trying to fit in at a new school and dealing with all kinds of girl problems? (Source: FUNimation)
Jiang Hao Yi, a normal, high school student who is extremely scared of getting into trouble suddenly becomes the Harem King of his school and gets confessed to by a bunch of beautiful girls! The worst thing is, Jiang hao doesn’t know any of the girls who confessed to him! What on earth is happening? (Source: Overworld Scans)
The story depicts the work-life of a perverted mangaka, Aito Yuuki, and his assistant, Ashisu Sahoto. Constantly pressured by his editor and lacking experience with girls, Aito asks Ashisu to act as a reference. (Source: AniDB)
High school student Issei Hyoudou is your run-of-the-mill pervert who does nothing productive with his life, peeping on women and dreaming of having his own harem one day. Things seem to be looking up for Issei when a beautiful girl asks him out on a date, although she turns out to be a fallen angel who brutally kills him! However, he gets a second chance at life when beautiful senior student Rias Gremory, who is a top-class devil, revives him as her servant, recruiting Issei into the ranks of the school’s Occult Research club.
Slowly adjusting to his new life, Issei must train and fight in order to survive in the violent world of angels and devils. Each new adventure leads to many hilarious (and risqué) moments with his new comrades, all the while keeping his new life a secret from his friends and family in High School DxD! [Written by MAL Rewrite]
Hope’s Peak Academy is an elite high school that accepts only the most talented students. Individuals who successfully enroll receive their own unique titles, suitably reflective of their skills and traits. Of the fifteen candidates admitted to the peculiar school that year, Makoto Naegi is a completely ordinary individual who has been accepted by sheer chance, with the title of “Ultimate Lucky Student.”
Naegi and his fellow classmates are initially ecstatic to be chosen to study at this prestigious institution, but these feelings of happiness are short-lived. They are soon confronted by Monokuma, the principal and resident bear, who traps them inside the school. The pupils’ hopes of escape and graduation hinge on one of them successfully murdering one of their peers without being discovered. However, if the killer is caught, he or she will be executed, and the remaining survivors will be left to continue the deathmatch until only a single victor remains. [Written by MAL Rewrite]
Katsuragi is back, and together with Elsie the hunt for loose souls continues on. This time however, they are joined by Elsie’s friend and fellow Demon, Haqua. (Source: ANN)
Kanna Aoyagi has never really knew what her older sister Yayoi does for a living, until Kanna turned sixteen. That’s when she finds that not only does Yayoi make erotic games (eroge), but she wants Kanna to become a voice actress for her upcoming production. At first, Kanna refuses. But one guilt trip later, Kanna winds up in the recording booth anyway, learning the ropes of eroge voice acting.
How can Kanna, who’s too embarrassed to even say the simplest crude words, become a voice actress for Rated-18 games? To make matters worse, she has to keep her new day job a secret from her high school friends, and must perform in front of her older sister and her sister’s (male!) childhood friend.
Soon, Kanna learns that what she lacks in experience, she makes up for with her vivid imagination. As it turns out, she might have what it takes to success after all. (Source: MyAnimeList)
Hikari Hanazono has always been second to Kei Takishima. When they were six years old, their pro-wrestling loving fathers introduced them to each other. Assuming that she was the best in wrestling, young Hikari challenged Kei to a wrestling match only to be thoroughly defeated by him.
Ever since that fateful incident, Hikari swore to beat Kei in school grades, sporting events—anything. To do this, she has enrolled in the same school as Kei since elementary. Now she attends Hakusenkan, an ultra elite school, that costs her carpenter father a lot of money.
Hikari and Kei are the top two students in the school, with Kei holding firmly to that number one position. While Hikari considers Kei to be a rival and important friend, she is completely unaware that Kei loves her. The story primarily focuses on Hikari and her constant attempts to defeat her one and only rival, Kei, and how she finds love in their rivalry. (Source: MyAnimeList)
Himenokouji twins Akito and Akiko have finally reunited with each other after separation due to the death of their parents. After six years of living apart they suddenly began to live under the same roof due to Akito’s desire to live as a family unit once more. Things were fine at first until Akiko began to express her incestuous love for her older brother, who only sees her as a little sister. (Source: Wikipedia)
References: MyAnimeList, Wiki, ANN