Rio of the group NiziU captured fans' hearts with a cute daily photo.

To commemorate her birthday, Rio posted a photo on the official SNS. In the released photo, Rio is dressed comfortably, wearing an ivory beanie pulled down low, and making a mischievous expression.

The pose of holding her hat with both hands while pursing her lips fully emphasizes Rio's unique lively and lovely charm. Fans showed affectionate reactions, such as "Happy birthday Rio," "Yellow suits you perfectly," and "I hope you are the happiest person in the world today."