Former IOI members Doyeon and Yoojung have finally returned from their U.S. trip. The duo is currently preparing to get back to school.

Doyeon and Yoojung have finally returned from their academic trip in the U.S., reports Koreaboo. The duo posted their selfies on iTeen's official Twitter account.

Doyeon and Yoojung posted selfies of themselves wearing their yellow uniforms, as they prepare for another semester as March marks the start for a new semester in South Korea. The duo also expressed how they are already powered up for the upcoming semester.

As previously reported, Doyeon and Yoojung went to Los Angeles, California to study and also for a little bit of rest and recreation. The duo has also met with well-known American music producers, such as B.O.B, Pitbull, and rapper Mac Miller. Yoojung has also met with dance and vocal trainers.

Doyeon and Yoojung seemed to have enjoyed their time in Los Angeles as pictures of them in Disneyland were uploaded at Fantagio iTeen's Facebook page.  A photo of Doyeon and Yoojung showed the duo arriving at the Los Angeles Airport.

One picture saw Yoojung hugging the mascot for Disney's character, Goofy. The next picture saw Doyeon posing candidly for the camera.

Another photo showed Doyeon and Yoojung posing behind rows of lamp posts. The duo's picture showed their childish side as they posed like they were playing hide-and-seek.

Some fans were also lucky enough to bump into Doyeon and Yoojung. The fans managed to take a picture of themselves and the duo when they visited Disneyland. There was also a video uploaded in Twitter that showed Yoojung shaking hands with the fans.

"We thought that [Yoojung] and [Doyeon], who promoted tireless as members of IOI last year, needed both a time to recharge," said the duo's agency Fantagio.  The agency also added that they hoped to hone the Doyeon and Yoojung's musical skills as they are to debut as members of a new girl group under Fantagio in the summer.