Miyu ties the knot after being urged to do so by her father. Kei, her husband and first love, is an heir to an old money conglomerate. She has looked up to him ever since she was little. It had always been a dream of Miyu's to get married...but Kei has yet to touch her. Heck, she doesn't even have his permission for them to live together. Six years have passed, and now Miyu has decided to get a divorce to put an end to her lonely days. But in the middle of asking for a divorce, Kei tells her that he can't hold back anymore, and he starts showering her with love?! Why did he keep his distance all these years, and why is he trying to show his love now? Kei's extremely clumsy attempts at showing his deep love for Miyu will have you swooning non-stop! (Source: MangaPlaza)

https://mechacomic.jp/books/243864

Kotone is not very good at being in front of people due to her past trauma, however, a handsome and talented president appreciates her competence and invites her to dinner... The president, who is famous for not smiling, is smiling kindly at her. Kotone unintentionally drinks too much and gets drunk, but when she wakes up, she wakes up in a hotel suite! "I can't believe it...i'm spending the night with the president in a hotel?!"

The person who appeared in front of me, a handsome man and a wealthy man, was... He was actually the perfect heir!? Rihoko, who is traumatized by a rich and handsome man after a heartbreak, invites him out to her friends. She decides to attend a matchmaking party. There he meets Aoi Sojo, a handsome but ordinary office worker. As they date, they become attracted to each other, and eventually become lovers! One day, feeling happy with Aoi's sincere love, Kazuichi Aoi unexpectedly shows up at Rihoko's company as the heir of a wealthy family.

Kasumi was proposed to on the very first day of meeting him. Her suitor was none other than Ichiya, a regular customer at the café where Kasumi works, affectionately known as the count with a sweet tooth. Kasumi had secretly been curious about Ichiya, who exuded an air of nobility like that of a count. However, for some reason, even though they weren't in a relationship, he suddenly asked her to help him build a family. At twenty-seven years old, with no romantic experience, Kasumi misunderstood this as a job offer under the guise of marriage.

https://www.cmoa.jp/title/329069/