Tying the Knot with an Amagami Sister manga volume 2 features story and art by Marcey Naito.

Atheist Uryu Kamihate just wants to get into medical school… but his foster father runs a shrine and expects him to marry one of the three priestesses! The buxom Yae, the diligent Yuna, and the sporty Asahi all have their charms...if they weren't miko! The Amagami Shrine is preparing to hold its annual festival, and the three sisters are all eagerly preparing! But when debtors come calling and the shrine faces bankruptcy, can an atheist and three shrine maidens set aside their differences long enough to weather the storm?!