Yeah, when he said "Don't tell anyone", he was probably talking about his relationship, not the fact that he would sleep with her. I believe in our boi.
I'm pretty sure this is a red herring my dudes. This has so far been a feel good manga, doubt it's suddenly gonna turn into a depressing drama.
Let's be real tho, if this was real life I'm pretty sure most dudes would not be able to resist after that panel on page 2.
OK~! Maybe its not as bad as it seems~ Perhaps he meant 'Don't tell anyone of what JUST happened, but forget this confession occurred'. No way does he abandon our girl after so persistently hitting on her and finally convincing her she can be loved. There won't be any redemption if this dude goes through with this