Shiko Academy student Ritsuka Tachibana is summoned by the boys of the Student Council and accused of violating school rules; a horrible incident happens at home.

Ritsuka meets the rest of the student council before leaving with Rem, its president, to pursue a promising lead in the search for her mother.

Ritsuka's brother, Lindo, goes to unusual lengths to keep her safe; Urie, a dashing student council member, has a few words to say about Lindo...

Ritsuka learns some truths about her family and the student council before having a confrontation with someone who isn't who he seems to be.

Lindo joins Ritsuka at the academy to keep her safe; Mage decides Ritsuka needs to spend some quality time with him and his irresistible charms.

After Shiki opens up to Ritsuka in the school garden, he takes her to a mysterious museum full of what he claims are Ritsuka's memories.