Tsuzuki Setsuri

The heir of the huge Fushiki corporation, Tomoe, comes to Japan as an exchange student. He is his father’s youngest child and on top of that - his mistress’s child, but he was still appointed as heir. There’s danger that people will aim for his life. They attach to him a new maid, with glasses, naturally clumsy and ill-mannered… who turns out to be his new bodyguard, defending Tomoe with her mop. Wikipedia

Kayuu, a doll-maker who was murdered six years ago made living dolls at the request of clients. Mitsuki, his daughter who is still finding out the mystery to her father, together with his favorite student Yue, are faced with countless ordeals. What is Kayuu’s hidden secret?

From Aerandria Scans: “Those who meet the owner of the secret mansion never return to their world again…” There are rumours spreading around Kunuyuki's school which say that students mysteriously disappear one after another from the campus, and that there is a secret door hidden somewhere. This time the missing person is Kuniyuki’s best friend - Kashiwagi. Are the rumors really true? Kuniyuki is angry and has no idea what to do about his friend, when he meets a strange, but very pretty girl called Towa. She says she is the guardian of the “outcasts,” those who were taken to the “mansion,” but what does that really mean…?!

Fujiwara Sunao is a rather unusual young lady. Not only does she prefer to wear her hair short and dress like a boy, but she also possesses the power to control water! One might think Fujiwara would be an odd fit at her school, but strangely, she's not. Between the destructive and demented school president, the kooky and somewhat stalker-like school nurse, and the obsessed underclassman who wants to be her apprentice, Fujiwara may be the sanest person at the school–which is a big help considering she may be asked to save it!

Seraphina, the daughter of a count, has a fiancé she absolutely despises—Teddy, a marquis’s son who has bullied her relentlessly since childhood.“I’ll make him hate me and force him to break off the engagement!”With that resolve, Seraphina disguises her appearance and figure, attending the academy as a deliberately “unremarkable” girl.But then, the second prince, Leonardo, takes an interest in her and proposes a certain deal…?!This prince’s demands are way too unreasonable…!!A doting romantic comedy that begins with a secret deal between a bold, no-holds-barred genius lady and a charming yet scheming prince!Original Web Novel

Seraphina, the daughter of a count, has a fiancé she absolutely despises—Teddy, a marquis’s son who has bullied her relentlessly since childhood. “I’ll make him hate me and force him to break off the engagement!” With that resolve, Seraphina disguises her appearance and figure, attending the academy as a deliberately “unremarkable” girl. But then, the second prince, Leonardo, takes an interest in her and proposes a certain deal…!? This prince’s demands are way too unreasonable…!! A doting romantic comedy that begins with a secret deal between a bold, no-holds-barred genius lady and a charming yet scheming prince! (Sana Scans) Comic-PASH

Manga adaptation of the second otome game. Divided in two parts, "Sakamaki Arc" and "Mukami Arc".