Vol. 1: Ko Nashi Fuufu, Eri no Baai Vol. 2: Dokushin Kare Nashi, Konomi no Baai Vol. 3: Single Mother, Yumi no Baai
‘Verd Academy’ is a special training institution for Alphas, where only the most outstanding are granted admission. Shion Kamizono, the academy’s top student, was under immense pressure to be the ‘perfect Alpha’—a burden that stood in stark contrast to the praise he received from those around him. One day, whilst living his school life by constantly taking headache tablets and pretending to be someone he wasn’t, Sakuya Mikado, an Alpha radiating an aura of a completely different calibre, transferred into the academy. Unsettled by Sakuya’s intense gaze, Shion suddenly developed symptoms akin to those of an Omega upon coming into contact with him! Before he knew it, he found himself pinned down by Sakuya, drowning in pleasure…?
https://kenelephant.co.jp/books/posts/56410/
She married to wealthy old men in their death bed to help her family. People called her "Lady Caregiver." She never hoped to be happy herself until... Cornelia Rosenblatt, eighteen years old, was on her way to Duke Spencer's estate for her third marriage. Although she was a bride, she didn't look happy--she was being forced to marry this old man, almost dying, by her father for the third time. Her father, Baron Rosenblatt, made contract with rich noble men who wished to be cared by a young, beautiful wife. In return, he earned money to pay his debts. Cornelia cared for her first husband and second husband as earnestly as she could. They lived longer than anyone had expected...and people started to call her "Lady Caregiver." She had long since given up on the prospect of a happy marriage. This is a story of a young sweet girl who finds love and happiness at last. (Source: Kadokawa)
A story of Olaf Tryggvason, or Olaf I, king of Norway in the late 10th century and the great-grandson of the first king of Norway Harald Fairhair.
"...A defenseless person like you could easily be eaten up." Sakura, who works as a secretary at a large company, is approached by her high-spec boss, whom she has had a crush on for a long time, and he sweetly advances on her, suggesting an arranged marriage. Sakura is confused by this sudden turn of events, but she can't contain her feelings of love!? (Source: Rimacomi, translated)