コンビニ夜勤、声が出せない店員（妹）に！？

"The customers will notice, Onii-chan!" At the cashier, in the back room, in the fridge!? Naughty night shifts with my little sister. (Source: Coolmic) Note: Simultaneously released in long-strip format on mobile reading platforms, resulting in a total of 18 episodes being sold in 6 longer ones digitally.