A ChannelA-Channel; Ａチャンネル; A 채널; A频道; A頻道; Канал А; Первый канал; A แชนแนล สี่แสบซ่า บ้าขั้นเอ

4-koma about the daily lives of Tooru who has just entered the same high school as her best and childhood friend Run-chan, who is now a second year, and her friends Yuuko-chan (whom Tooru bullies cause they meet under bad circumtances) & Nagi-chan (who watches). Included is a side story called Days in Junior High School in volume four which tells how Run and Tooru met and their adventures in high school.