Hadaka no Oujisama - Love Kingdom

Hadaka no Oujisama - Love Kingdom summary:

Nanako has lost her parents at a young age, she never knew her father, and her mother died right after she entered middle school. Since then, she has lived in a temple with other orphan kids. But Nanako always had the assistance of her father's old friend Seitou. One day Seitou transfers Nanako to a luxurious school in Tokyo. There, a boy named Subaru kisses her and it turns out that he is actually her betrothed? -- Manga Updates