This is a campaign of get stickers from water bottles.
1: 10 hats (index biting your head).
2: 10 pijamas of Gekkota.
3: 50 wall scrolls.
4: 200 hug pillows of Kanzaki and Accelerator (your golden opportunity greed, sorry OS no Touma this time).
5: Telephone cards with Judgment of Index logo.
6: Illustrations.
7: Gekkota Mask.