Wotakoi: Love is Hard for Otaku

Having slept through all four of her alarms, the energetic Narumi Momose finds herself running late for her first day of work at a new office. As she races to catch her train, she makes a promise to herself that none of her coworkers will find out about her dark secret: that she is an otaku and a fujoshi. Her plan goes instantly awry, though, when she runs into Hirotaka Nifuji, an old friend from middle school. Although she tries to keep her secret by inviting him out for drinks after work, her cover is blown when he casually asks her whether or not she will be attending the upcoming Summer Comiket. Luckily for her, the only witnesses—Hanako Koyanagi and Tarou Kabakura—are otaku as well. Later that night, the pair go out for drinks so that they can catch up after all the years apart. After Narumi complains about her previous boyfriend breaking up with her because he refused to date a fujoshi, Hirotaka suggests that she try dating a fellow otaku, specifically himself. He makes a solemn promise to always be there for her, to support her, and to help her farm for rare drops in Monster Hunter. Blown away by the proposal, Narumi agrees immediately. Thus the two otaku start dating, and their adorably awkward romance begins. (Source: MAL Rewrite)

TONIKAWA: Over The Moon For You

The story follows a protagonist whose name is written with the characters for "Hoshizora" ("Starry Sky" in Japanese), but whose name is pronounced as "Nasa". On the day of his high school entrance exams, Nasa encounters a beautiful girl named Tsukasa. For Nasa, it feels like destiny is finally calling out to him that he will have a girlfriend, but things take a turn for the worse when Nasa is hit by a car and unable to attend his entrance exams. After Tsukasa helps the injured Nasa, he confesses his feelings to her, and she agrees to go out with him, but only if Nasa agrees to marry her first. A year later Nasa aces the entrance exams, but he decides to work a part time job and live by himself instead of going to school. After Nasa turns 18, Tsukasa re-appears, and their happy, romantic, and mysterious married life together begins. (Source: Crunchyroll)

More than a Married Couple, but Not Lovers.

Third-year high school student Jirou Yakuin hoped to partner with Shiori Sakurazaka of the same class in the mandatory "Couple Practical" course. In this practical, students must demonstrate that they have the necessary skillset to live with a partner of the opposite sex while presenting a certain level of harmony to the video surveillance that grades them. Unfortunately, random chance put his slightly subdued self into the practical with the person polar opposite to him, the gyaru Akari Watanabe. Akari on the other hand hoped to be paired with her crush Minami Tenjin. Their hopes are doubly dashed when they find out that Shiori and Minami are assigned together. Thus, they reluctantly decide to cooperate to reach the top ten, which would give them the right to exchange partners if both couples agree. To that end, Jirou steals Akari's first kiss without realizing what he'd done, while giving a hurried good-bye kiss...

Rent-a-Girlfriend

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. "Ugh... Damn it. I never want to go through that again." Completely spiteful, Kazuya uses a certain method to date a girl. He goes to their meeting place and suddenly hears, "You're Kazuya-kun, right?" 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! (Source: Crunchyroll)