Complete the indicated task to unlock the corresponding bonus.

Bonus	How to unlock
"Otaku" difficulty	Complete the game.
"The Standard" Character motion accessory	Complete the game.
Akihabara NPC character models	Complete the game with each girl's route.
Anti-Gravity Manual motion accessory	Complete all five character routes.
Berserk Touko model	Complete the Rin Route.
Change character models	Complete the corresponding route for a characters; for males, complete all the heroine routes.
Change partner's underwear	Complete the game. Note: You must be also be able to change that character's outfit.
Character affection hint option	Complete the game under the Casual or higher difficulty.
Character model size change	Complete the game under the Casual or higher difficulty.
Character Skin Tone Change	Complete the game under the Casual or higher difficulty.
Character Voice Change	Complete the game once under the Gamer difficulty
I'll Try Higher Tomorrow motion accessory	Complete the game with at least 50% of all sub-missions finished.
Kaito's model and shoes	Complete the Touko Route.
Kati's model, shoes and talisman	Complete the Touko Route.
Master's model and shoes	Complete the Touko Route.
Mind-controlled Kati model	Complete the Shion Route.
Nana's model, shoes and parka (hood down)	Complete the Sister and Nana Route sub-missions.
Rin's model, shoes and charm	Complete the Rin Route.
Sakaguchi's model, glasses and shoes	Complete the Shion Route.
Shion Kasugai's model, shoes and amulet	Complete the Shion Route.
Shion's mask, lab coat and weird prayer beads	Complete the Shion Route.
Shizuku Tokikaze's model, shoes and talisman	Complete the Shizuku Route.
Souga's character model and shoes	Complete the game under the Casual or higher difficulty.
Touko Sagisaka's model, shoes and ward	Complete the Touko Route.
Transparent clothing mode	Complete all five character routes.
Walking While Looking Down motion accessory	Complete the game with 100% of sub-missions finished.
Yuuto's model, glasses and shoes	Complete the Touko Route.
Zenya's character model and shoes	Complete the game using the Rin or Shizuku Routes under the Casual or higher difficulty.