she got NTRed from you? i am sorry to hear this :/
life has taught us: if you have an osananajimi, dont let her go too far away from you. and dont let your best friend/random annoying dude get close to her.
I don't ever remember being NTR'ed. And evening Shiki.
She wasn't exactly an Osananajimi, per se, just a girl that I knew for quite a while, in both Primary and Chinese school. Never had an interest in her so it's all good.
I really want to buy Darling but its about 12500 yen for the Regular edition and 33000 yen for the Deluxe edition. Not really sure what's in the Deluxe, but either way I would have to save up or do a split