It’s fine it’s fine!!
I went to the Doujin K-Books in Ikebukuro, which is on Otome Road. You kinda gotta walk down towards Sunshine City (follow the signs in the station that point you towards it, and then look for a lotteria and a cafe something. walk right inbetween those two) and then turn right-ish, you should pass the new K-Books Men shop, cross the street towards a Family Mart that curves around a corner and turn left-ish around that building and then you’re on Otome Road. You’ll pass an animate, like three other K-Books (anime, cast, and comic) before you get to the one with 同人(館? i think? i’m prolly remembering wrong) on on the front of the building (should be above yet another family mart I think), and then you just go up the stairs on the side of the building to enter. my directions might be bad though, I got “lost” (aka: thought i was lost but i actually kinda wasn’t) a handful of times orz (i’m really directionally challenged). You should pass the Mandrake on Otome Road on your way to that K-Books, but I have no idea what their sections are like. Otome Road from my understanding is pretty good for general stuff as well as NL and BL.
As for the pokemon section, Gin actually told me where the it was in that store was before I got there, so I already knew where to head (2nd floor (of the store itself, the store technically starts on the second floor of the building), back-ish area. it’s at the end of one of the shelves. look at the top of the sections as well since they have labels). There are some sub sections of the pokemon shelf (N主, NL, BL, Other couples, SubMas, and some others i think) so you can use those to guide your search through it. Doujin are pretty inexpensive (all the ones I bought were between 200jpy and 500jpy) since they only charge for the cost to print them. The bigger the book though, the more expensive it will be since it would cost more for the circles to print them.
this got long sorry orz