Boku no Imouto wa "Osaka Okan" - Season 1

The anime follows a salaryman who has a chance meeting with a girl named Ai on the train. They begin to meet every Monday on the train, with the man serving as her bodyguard on the crowded commute while they chat.

Miyamo Chio, a first-year at the completely ordinary high school Samejima Academy. Chio just wants to get through her school life without standing out too much, but for some reason, all kinds of obstacles await her along the path she takes to school. Her long-time friend Nonomura Manana, who's trying to quit being an otaku; the flawless Hosokawa Yuki, who occupies the top caste in the school; and lots of nameless people about town find themselves in Chio's path as she employs the (useless) techniques she's acquired from her Western video games in her daily efforts to get to school.

16-year-old super-studier Nagi Umino, second-year student at the Megurogawa Academy high school, was switched at birth. On his way to a dinner to meet his birth parents, he accidentally meets the brash, outspoken, Erika Amano, who is determined to make Nagi her fake boyfriend as she never wants to actually marry. But once Nagi makes it to dinner, he finds his parents have decided to resolve the hospital switch by conveniently having him marry the daughter his birth parents raised...who turns out to be none other than Erika herself!

Kintaro Oe is a 25-year-old boy who left Tokyo University and now lives a simple life, traveling by bicycle to learn everything he can about the world.

"I know! I'll become a monk!" Akagami Akemitsu has spent his days and nights absorbed in studying and part-time work in an effort to distance himself from his family, which is notorious as a household of philanderers. One day, he falls in love at first sight with a girl named Aoba Yuzuki, and suddenly he's constantly drowning in worldly desires. Hoping to fight back against his genes and live a more stoic life, he enters a temple... only to find out that it's a convent filled with gorgeous girls! So begins a new rom-com about the temple life of three adorable triplets and two beautiful freeloaders!

One rainy day, salaryman Amakusa Ryo is saved by a high school girl he doesn't know at the station. He later finds out that the girl is Arima Ichika. Ryo is somewhat of a womanizer and to repay her for saving him, he suggests giving her a kiss or going out on a date with her, in which Ichika tells him he's creepy. This, however, opens a new door for Ryo and he falls madly in love with her. Ever since then, Ryo tries to overly express his feelings to Ichika. Ichika just keeps insulting him and says he's being creepy, but he just seems to take it as her way of showing affection towards him...

Miyako is a shy college student who is also an otaku. One day she happens to meet some angelic grade school kids! When Miyako sees her little sister's new friend Hana-chan, Miyako's heart won't stop racing! Miyako tries to get along with them but struggles... A sketch comedy all about trying to get along with the super cute girl is about to begin!

Kinoshita Kazuya is a 20-year-old failure of a college student. He managed to kiss his girlfriend once, but was dumped after a month. Completely spiteful, Kazuya uses a certain method to date a girl. He goes to their meeting place and a beautiful girl brushing her long, black hair behind her ear was there, smiling at him. Her name was Mizuhara Chizuru. Something real is born after just a single rental! A reckless rom-com filled with love and excitement is about to begin!

16-year-old Hayate is really down on his luck. Because his unemployed parents are good-for-nothings who waste what money they have on gambling, Hayate had to start working at a young age to help out his family. Although such experience has made him inhumanly fast and tough and skilled at things boys aren't normally skilled at, it has also left him in an awkward position, as his parents have racked up such a huge gambling debt that they have sold Hayate to the yakuza for the value of his organs. In a desperate attempt to avoid that fate, Hayate decides to become a "bad guy" and kidnap someone to be held for ransom, but his efforts to do so are mistaken as a confession of love by the girl he targets. When he helps save the (as it turns out) ultra-wealthy 13-year-old Nagi from real kidnappers, she takes him in and gives him a job as her new personal butler (and love interest) until he can pay off his debt. But Hayate is more attracted to Nagi's beautiful teenage maid Maria, and head butler Klaus is initially disapproving of a boy with such a poor look. And then there's Nagi's pet Tama, who is also a force to be reckoned with.

Kimihara Himeno, also known as "Hime," goes about her life, love, and studies just like any ordinary high school girl. The only difference is that she's a centaur. She enjoys her school life along with classmates of many unique shapes, including Nozomi the draconid, Kyoko the goatfolk, an angelfolk class representative, and Sassas-chan the Antarctican. Hime's younger cousin Shino-chan, her friend Maki-chan, and the class representative's four younger sisters also join the cast in this very cute slice-of-life story about girls who are human, yet aren't!