I forgot it, but it was dumped on /h/ a few months back. It's NTR shit. The long and short of the plot >Fat Japanese salaryman is a loser >His boss is a bitchy OL who is married and has two children >But she's also fucking a young, handsome salaryman on the side (his name is Takizawa by the way) >Takizawa helps the fat loser fuck and mindbreak the OL boss
That text bubble doesn't actually happen in the story by the way, it's an edit.
Gavin Smith
Reverse image search and google literally says the name of the series. Apply yourself.