If Witch Then Which (Manga) Vol 01

Haruka Kuse sees Maruna Rinjou as his savior-he owes his life to her blood transfusion, after all. But what he never knew is that she's actually a witch! Haruka wants to repay the favor somehow, and the answer is...crossdressing to help Maruna pass her magic exams?! Ato Sakurai, author of Today's Cerberus, brings a fiery new magical romance! Yen Press
(W/A/Ca) Ato Sakurai