Description:

The government uses genetic information to determine what people would be best matched to produce the best offspring possible. Once the youngest of the two is over 14 a letter is sent to both homes telling them when to meet at the coupling center, where they meet their new fiance and are given one week to get to know each other to see if they want to marry. There are multiple stories in this, each lasting a few chapters, telling different tales of how couples deal with their pairing.

Description:

Seventeen-year-old Mugi Awaya and Hanabi Yasuraoka appear to be the ideal couple. They are both pretty popular, and they seem to suit each other well. However, outsiders don't know of the secret they share. Both Mugi and Hanabi have hopeless crushes on someone else, and they are only dating each other to soothe their loneliness. Mugi is in love with Akane Minagawa, a young teacher who used to be his home tutor. Hanabi is also in love with a teacher, a young man who has been a family friend since she was little. In each other, they find a place where they can grieve for the ones they cannot have, and they share physical intimacy driven by loneliness. Will things stay like this for them forever? (Source: MangaHelpers) Included one-shots: Volume 1: Nyan Nyan Prelude Volume 2: Nyan Nyan Serenade Volume 3: Nyan Nyan Oratorio Volume 4: Nyan Nyan Cantata Volume 5: Nyan Nyan Andante

Description:

Jirou, a third-year in high school, is forced to live with a gal named Akari under a course called the "Couple Practical." In order to be paired with their own romantic interests, they're going to act as a married couple...!? (Source: MangaDex)

Description:

As a child, Raku Ichijo made a secret promise with his childhood sweetheart, keeping a pendant as a memento while his love took the key. He dreams of one day meeting his past love, but years later, reality smashes his hopes when Chitoge Kirisaki accidentally knees him in the face... Though Raku’s a normal high schooler, his family heads the notorious yakuza gang the Shuei-Gumi faction! And he’s dragged into family affairs when he’s forced into a relationship with Chitoge, the daughter of a rival gang’s boss! Despite their constant spats, the two somehow fool everyone with their false relationship. Raku then discovers that Chitoge has a mysterious key from her past, which she can’t remember... Plus, two other girls appear with keys as well—Kosaki Onodera and Marika Tachibana! Caught in the midst of this love maelstrom, even more complications arise for Raku when his class decides on Romeo and Juliet as the class’s play for the school festival. Can the two false lovebirds pull off the impossible and make the play a success? (Source: VIZ Media)

Description:

High schooler Natsuo is hopelessly in love with his cheerful and popular teacher, Hina. However, one day at a mixer, he meets a moody girl by the name of Rui and ends up sleeping with her. Soon after, his father announces that he's getting remarried to a woman with two daughters of her own. And who shows up in tow, other than both Hina and Rui?! Natsuo's outrageous new life starts now! (Source: Kodansha Comics)