its Hero time! ( male reader x ben 10 girls and FGO girls)

Y/n is original boy who hangs out with ben,Gwen and kevin since he is about to move away and as always villain try to evil stuff and ben kick ass, so how is it different you may ask? albedo use a new device and plan to transport ben only, but was misdirect it and hits Y/n transporting him into a dimension known as: Nasuverse which arrive at the hidden place known as chaldea and even contains a exact omnitrix that found out that none of them would daré to test it, in which upon he accidentally got it.

now he must live in helping chaldea and other genderbend ben and other girls which...well got attach to him toooooo much ^^"