How could a person like Kusuda ever delete those kind of picture?
If i were Mamoru, i would doubt it ever if Kusuda do it in front of me on his cellphone. It`s not like the old days when you`ve photos and negatives; it`s digital now. I presume most would definitely have three or four mediums of digital storage these days: hard drive on your computer, usb thumb drive, cellphone, iPod-like music player and internet.
Anyway even though Kusuda may harbor real feelings for Kei, i`m still going to bet that he`s going to make thing worse before it gets better. Next chapter, it`s time for Kei to run crying back home. Or maybe to some secluded places where Kusuda would find later.