誘われちゃったんですけど。

From Author Wars - https://authorwars.com/publications/you-warechiyatsutandesukedo-551818.html

Overview:

Title: 誘われちゃったんですけど。
Author: 榊一郎
Year: 2004
ISBN-10: 4757719310
Publisher: エンターブレイン
Pages: 251
Binding: Paperback
Type: Novel
Title Reference: 誘われちゃったんですけど。
Notes: Data from Amazon.co.jp
Cover artist per cover credit
Title transliterates as "Izanawarechattan Desukedo." (Actually, I Already Invited You.)