Yeah, time to get involved. Leaving his folded up glasses on the sink to avoid any damage- he's reckless enough with those, no need to make them Ken collateral- Chikusa takes the blunt approach of going straight up to ken.

The nice thing about Ken is that there's no need for overly long foreplay or sweet talk. All you have to do is grab his crotch. Which, for the record, is exactly what Chikusa is doing.

"If you get this uniform messy, I'm getting the bad shampoo."

And, you know, threatening him.