Since I cannot directly link to or provide pirated scans, I can instead of what “Chapter 1 / Tap 1” typically contains, based on publicly known synopses of the series: Hotaru no Yomeiri – Tap 1 (Chapter 1) Content Breakdown Title hint: Hotaru (firefly) + Yomeiri (wedding) — often a historical or fantasy romance, sometimes bittersweet.
It looks like you're referring to ( Firefly’s Wedding / A Wedding for a Firefly ) — a manga series. “Tap 1” likely means Chapter 1 or the first part of a doujinshi/webtoon release. i--- Hotaru No Yomeiri Tap 1