Tying the Knot with an Amagami Sister manga volume 1 features story and art by Marcey Naito.

Uryu Kamihate has had a rough start to life, but plans to forget it all by achieving his dream -- matriculating into medical school. But when he arrives at his new foster home, a working shrine, his dream of a quiet place to study goes up in smoke. Not only will he be living with three beautiful, lively Amagami sisters -- but he learns that he must marry one of them and take over the shrine!