The Reason We Fall In Love

Kusanagi Kei, a high-school student living with his aunt and uncle, has an encounter with a female alien. This alien is revealed to be a new teacher at his school. Later, he is forced to marry this alien to preserve her secrets. From there, various romantically-inclined problems crop up repeatedly.

Futuba Igarashi's new job would be great if her senpai, Harumi Takeda, wasn't so incredibly annoying! Futuba hates his laugh, she hates how big he is, and she really hates that he treats her like a little kid. Just because Futuba is short and looks young doesn't make her a kid, and just because she spends so much time with Takeda doesn't mean she sees him as anything but an annoying senpai...or does she?!

Mizuki disguises herself as a boy and transfers to the same all-boys' high school her idol, Izumi Sano, a high-jump athlete who gave up on the sport, attends. In between their classmates' antics she tries to get him to jump again.

For Himuro, being a descendant of a snow spirit is tough at the workplace when your emotions can lead to snow blasts with snowmen and igloos. Any emotionally charged incident with coworkers can trigger it—conflict, fun, and in this case, romance. And with his lovely and calm coworker Fuyutsuki, he gets more frozen, literally. Get ready for a snow-white office romance that blows in like a blizzard.

After a shy office worker unexpectedly gains the ability to read minds, he discovers that his handsome colleague can't stop thinking about him!

Real estate agents Reiko Kujirai and Hajime Kudo work in the nostalgic Kowloon Walled City. As they spend more time together, Reiko’s feelings for Hajime grow. But when she finds a photo of him and his former fiancée, she’s shocked to see the woman looks exactly like her. Reiko then realizes a chilling truth: she has no memory of her past.

When Shinozaki started his new job, he didn’t expect his superior to be so…cute!? He struggled to learn the ropes until Katase, his tiny and kind senpai, took him under her wing. But as they grow closer, he hopes her attention might mean something more.

Akihabara is the center of the universe for the coolest hobbies and quirkiest amusements. In the spring of 1999, bright-eyed Nagomi Wahira moves there with dreams of joining a maid café. She quickly dons an apron at café Ton Tokoton, AKA the Pig Hut. But adjusting to life in bustling Akihabara isn't as easy as serving tea and delighting customers. Paired with the dour Ranko who never seems to smile, Nagomi must do her best to elevate the Pig Hut over all other maid cafés vying for top ranking. Along the way she'll slice out a place for herself amid the frills and thrills of life at the Pig Hut. Just when Nagomi's dreams are within her grasp, she discovers not everything is as it seems amid the maid cafés of Akihabara.

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!

Shion and Rui are the dream team when it comes to hitting on women. Tonight was going to be another night of hooking up with girls for Shion, but he ended up taking a strange drug. When he woke up... he'd turned into a girl?! Rui came looking for Shion, but didn't recognize him, and started hitting on him...

The story follows Rena Yukuhasahi, a reserved office lady and Ryouhei Hachiya, a businessman and fellow colleague. Yukuhasahi appears to be the most reserved girl in the company, but becomes a super beautiful woman when she dresses up. Flustered in the presence of her transformed self, Hachiya insists on taking her out, only to find themselves in front of a love hotel.

Yuki Itose is just a typical student dealing with the pressures of college. She is struggling one day on the train when an upperclassman named Itsuomi Nagi helps her out. As he gradually opens a new world to her, Yuki develops feelings for Itsuomi. A pure love story begins to grow.