Sekai Ichi Hatsukoi: The World's Greatest First Love (2011)

Three couples, three intense romances: a student’s tutor crosses the line, a loner meets a force of nature, and a carefree man faces love he can’t ignore.

Kaoru is a college boy with everything going for him. He lives in a mansion with his beautiful fiancé, Aoi, all his roommates are babes, and they all have the hots for him. There’s just one hitch: due to family complications, Kaoru and his beloved have to keep their engagement a secret. As he gets tangled in countless steamy situations, can Kaoru overcome temptation and stay true to the lovely Aoi?

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!

Shinichi Sakurai’s one wish is for a little peace and quiet. But Hana Uzaki — his boisterous, well-endowed underclassman — has other plans. All she wants is to hang out and poke fun at him. With the help of her chipper charm and peppy persistence, this might just be the start of a beautiful relationship!

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...

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!

Tamahiko Shima has been exiled to the country because of his disability, but the sudden arrival of an arranged bride upends his lonely life.

"A girl in a lower grade just made me cry!" One day, Senpai visits the library after school and becomes the target of a super sadistic junior! The name of the girl who teases, torments, and tantalizes Senpai is "Nagatoro!" She's annoying yet adorable. It's painful, but you still want to be by her side. This is a story about an extremely sadistic and temperamental girl and you'll feel something awaken inside of you.

Down-on-his-luck Koushi Nagumo wanders the streets unemployed, homeless and in search of his next meal. His fortunes improve after a chance meeting with a vivacious young woman whose proposition seemingly solves nearly all his problems. Thanks to her, Koushi enters the welcoming halls of a dormitory at a women’s college… only this particular assignment is no stuffy, sleepy affair. The Goddess’ Dormitory is known for housing the college’s most unruly students! If he wants to keep a roof over his head, Koushi must become the “Dormitory Mother” charged with maintaining order and good discipline. But doing his job and keeping his sanity are no small feat with characters as endearingly eccentric and untamable as these!

Socially awkward Aharen-san has personal boundary issues, either getting too close or too far from her classmates. When fellow student Raido picks up an eraser she drops, Aharen-san decides they’re now best friends. Whether studying, playing the arcade, or just eating lunch—she’s along for the ride. What follows is an impromptu bonding that shows affection can blossom in the unlikeliest of places!