Time Regression

Time Regression (時間退行）is the first phenomenon caused by #2 and the third phenomenon the members of the StuCS experience. This phenomenon is featured in Volume 3: Kako Random.

Description
The members of the club at first except for Taichi will turn in their younger selves both physically and mentally between the hours of 12 - 5 pm. When the members return to their original age, the memories from that time will be remembered clearly. After Taichi told the other members about #2 he also under went Time Regression and the timing and duration became random as well

Trivia

 * This is the only phenomenon with a physical change which is visible to the naked eye of others in public.