Just a short time ago HKT48 the young sister group to AKB48 had a meltdown with five members leaving the group to a wide range of rumors ,talk of betrayal .
Five members of HKT48 quit [4 maybe fired], their profiles removed and their accounts in the process of being deleted.
Eto
Komori
Sugamoto
Taniguchi
Nakanishi
The members are Eto Sayaka, Komori Yui, Sugamoto Yuko, Taniguchi Airi and Nakanishi Ayaka.
The official reason is personal reasons and with that the speculation begins. There are a number of boyfriend and other more damaging conduct rumors floating around and Komori had a quickly deleted post about feeling betrayed by a member she went to for advice possibly in relation to what Eto, Sugamoto, Taniguchi and Nakanishi were doing . She seems to have quit after feeling hurt beyond forgiveness.
As the ages range from 13 to 18 management is not required by law to release information regarding this situation, so the official reason of personal reasons is all they are required to comment on.
On a personal note I really dislike reporting about idol careers ending in scandals, I always feel a mix of sadness and disappointment at careers ending in poor judgment