"Who's Hot? Hello, I'm Hyeongshin!"
Hyeongshin (형신), formerly known as Yu Ha (유하), is a South Korean trainee currently under S2 Entertainment. She was a member of the girl group HOT ISSUE and a former member of the pre-debut girl group ALLS-GIRL and D-CRUNCH's pre-debut sub-unit Geupsik-Dan. She is also known for being a contestant on the competitive reality show CAP-TEEN. She is part of a dance crew named Velvety.
On July 5, 2018, it was announced that Hyeongshin would be debuting as a member of Geupsik-Dan, a special sub-unit of the then-upcoming boy group D-CRUNCH. The unit debuted on July 10 with their self-titled digital single.
On October 24, using the stage name Yu Ha, she was revealed as a member of the pre-debut girl group ALLS-GIRL. However, on February 28, 2019, she departed from the group and All-S Company.
In October 2020, she was announced as a contestant on the teen survival show CAP-TEEN. In the 10th and final episode, she performed the original song "Ice cold". She was then eliminated, finishing the show in 7th place.
Hyeongshin debuted as a member of Hot Issue on April 28, 2021 with the mini album "Issue Maker".
On April 22, 2022, after 4 months of no updates, S2 Entertainment announced that the group has officially disbanded, 6 days before their debut anniversary. The decision was made after a long period of discussion about their future and direction of the group.