[きいろのわごん2] SNSの一発ヤレる応募企画に参加したらそのままセフレになった話

[Kiiro no Wagon 2] The Day the Ribbon Fell ~ How I was NTR'd by a Playboy in my Class without My Childhood Friend Knowing [English]

[Kiiro no Wagon 2] Ribbon no Ochita Hi ~Osananajimi no Kare no Shiranu Ma ni Class no Charao ni NTR sarete ita Hanashi.