Nah he sealed them with his loincloth, he uses clothing to fuel his jutsu, which is why he is always practically naked. You can see the tendrils coming from the loincloth on page twenty.Did the guy... just... sealed with their cum?
What I saw in the first panelThey can't lose in the Totsugeki dimension
I'd like to think so but it seems he just used his sweaty ass tightywhitey underwear.Not cum, only the finest spider fluid