Amazon.co.jp: 異世界パパ活おじさん（コミック） 分冊版
Given these points, here's a write-up:
The manga is an adaptation of an R18 light novel, which may account for the high chapter counts seen in some search results, as web novels often reach hundreds of chapters while the manga adaptation remains in the dozens. Where to Find Authentic Chapters isekai papa katsu ojisan chap 353 raw manga welovemanga link
: Useful for verifying the total volume and chapter counts currently in circulation . Amazon