A salary man is quite depressed, especially on Mondays. At his lowest point a well-endowed High-School girl calling herself Ai-chan stumbles breast-first into his face. The concussion she gave him served as the start of their relationship. **Notes** - This page refers to the Blue Tankobun Edition released alongside the conventional b&w edition starting November 16, 2020 - Not to be confused with the Tankobun collecting the Weekly Tawawa Offering uploaded to author's Twitter every Monday since February 23, 2015 and published since December 31, 2015