On 28th, I met 6157F set of Seibu 6000 Series with the decoration of a Japanese anime "Anohana ~the flower we saw that day" at Shakujii-koen [Shakujii Park] Station.
This train was in service the same operation as the last time I met on July 8th, so I knew when the train came to. I went ahead by an earlier train and waited for it.
The YouTube video is when the unit went to a sidetrack.