He was absent from the Fukuoka concert. Some people saying it was due to school, but the others say that it was because he wouldn't be able to travel back home afterwards and some are saying that he was banned for taking a photo with some girls in his class. There is also a rumor going around that he cried because he and Marius are constantly separated from Sexy Zone and put into the background.
maybe this is the picture of Sou taking picture with his classmate.
credit of photo: dhella.
source: sexyboyzmarisou