Enbure!

From MangaHelpers:

Hashidate Junichirou has falllen into a fantasy world. In order to get back home, he's teamed up with a self-proclaimed first-class witch, Michiru. It turns out Junichirou has Magi power, which he can bestow on Michiru through her chest. Michiru, with his help, plans to defeat other magic users and collect all their emblems, eventually becoming the Emblem Master! If they can achieve that, a wish will be granted to them, which Junichirou can use to finally get back home! [tethysdust]