Makoto Kikuchi, Vivid Bikini, Idolmaster

The image depicts Makoto Kikuchi standing in front of a large body of water, possibly a pool or lake, wearing a black bikini top and bottoms. The woman has short gray hair with a white flower in her hair. She is smiling at the camera, showing off her teeth. Her left arm is bent at the elbow, and her hand is raised to chest level. Her right arm is straight down by her side. In the background, there are several people standing on the shore or walking around. The sky above is overcast, with a few clouds visible in the distance.