胸キュン！はぁとde恋シ・テ・ル～お兄ちゃんもっと大好き～

One day, a letter with just one world "marriage" from comes from Yuta's father. Upon returning to home town Yuta does not find his father in the shrine. Instead, there are three childhood friend girls. It turns out that father's new wife is mother of these three girls. Now Yuta is stuck in the shrine with three new cute sisters while parents are on marriage voyage...

[From vndbreview]