This is NOT Casual Nudity pool material... At all.
It has too many rapey-vibes to it, seeing how the overweight dude is profusely sweating, while also not matching the physique of anyone Nanako would be close to... ergo, that's NOT familiar person to her, which would imply something real sad and nasty is about to happen.
Deleting from pool... don't insist and try to add it again... it's really disgusting to me when I see pics that clearly go against the Casual Nudity pool wholesome spirit. Don't try to ram a square peg into a circle space.