The country of Japan is being terrorized by the undead, known as "Revenants." Tachibana Kaguya makes it her life goal to protect her fellow citizens from these zombie-like creatures, just as her father did before her. When she enrolls in Reimeikan Academy, a school that specializes in training soldiers that will eventually become part of a movement to expel the Revenants once and for all, she is reunited with Tokugawa Ichii… a boy her father had died to protect—a boy who had promised to build her a world free of monsters.

(Source: Dazzling Scans)

Hanamura Chouko, a 16-year old girl, finally summons the courage to tell Tsukiyono her feelings for him. However, her twin brother Hayate (said to be a sis-con) is worried about her because Tsukiyono is very popular among girls. While he's trying to persuade her to keep away from Tsukiyono, they accidentally fall down the stairs and switch bodies. "I am You, and You are Me? What's going on...?" Give me back my lovey-dovey days with Tsukiyono-kun...! A new love story with unexpected twists starts now

The orphan girl Angelique lives in Hidamari Villa with four other comrades who make up the Orb Hunters. They aid her in purifying otherworldly creatures known as Thanatoi who attack the populace, draining them of their life energy. Two large organizations also oppose this threat, while its members try to discover more about the Orb Hunters and a possible connection with the legend of the Queen.
(Source: Storm in Heaven)