Double Reaction! Plus

The heroine Yuri is unhappy that she’s not as good looking as her twin brother Kairi. When they find a wishing stone, Yuri picks it up and wishes to change her looks, but the stone drops down and breaks. Later one morning when the school year is already started they find that stone back on top of Yuri's bed. When Yuri touches the stone, she and her brother end up switching bodies. While her brother isn’t too happy about being a girl, Yuri can’t wait to spend her time being a boy for once. The body switching seems to be on and off and so the twins’ adventures begin!