I’m 99.99% sure this isn’t just any old washi washi. This is nothing less than the MC’s Yuri Hand tickle technique. Now I know what you’re thinking, “This is too lewd to be tickling.”
The hint is kasumi’s reaction. She’s pouting, and is also the least blushy of all the girls here. She’s also the only one that’s not ticklish (her in game tickle dialogue she fake laughs and then confirms her tickle immunity). Coincidence? Doubtful
Well it's been a while since the game where this ship in appears so it probably makes sense there's not many people drawing it now compared to the past.
I've probably seen too much Splatoon Yuri. Every time theses two do the map update, I imagine them aggressively flirting. While the suits from Standards & Practices are losing their minds!