The antibody information of a cell has leaked. There is tension in the air after NK Cell makes a comment to White Blood Cell (Neutrophil). The journey to reunite the lactic acid bacteria with their friends takes the group to the large intestine. In the intestine, which has been irritated due to toxic gas being released by harmful bacteria, the group meets up with Memory T Cell who was formerly known as "Killer T Cell."

• Yuuko Kakihara
• Ken'ichi Suzuki
• Kenichi Suzuki

• Kikuko Inoue
• Kana Hanazawa
• Tomoaki Maeno