A purchase in the shop is required as well as fulfilling the unlock conditions in order to use the accessory.

Accessorie	How to unlock
Angel Feathers	Clear Day 4-6.
Angel Wings	Clear Day 5-7.
Angel's Halo	Clear Day 8-9. (No purchase necessary)
Bad Mask	Clear Ikaruga's "Shinobi Girl's Heart" story.
BC Mask Visor	Clear Ikaruga's "Shinobi Girl's Heart" story.
Bean Sprout Mask	Clear Ikaruga's "Shinobi Girl's Heart" story.
Bebeby Mask	Clear Ikaruga's "Shinobi Girl's Heart" story.
Black Eyepatch	Clear Day 3-5.
Black-Rim Glasses	Clear Day 0-6.
Bunny Ears	Clear Day 3-5.
Cat Ears	Clear Day 0-6.
Cat Tail	Clear Day 1-5.
Collar (Bell)	Clear Day 0-6.
Collar (Chain)	Clear Day 0-6.
Devil's Tail	Clear Day 2-6.
Dog Ears	Clear Day 0-6.
Dog Tail	Clear Day 1-5.
Futomaki	Clear Day 1-5.
Giant Fan	Clear Day 3-5.
Hannya of Love	Clear Ikaruga's "Shinobi Girl's Heart" story.
Hibiscus	Clear Day 1-5.
Leather Eyepatch	Clear Day 4-6.
Military Cap	Clear Day 5-7.
Pres. Haru's Hat	Clear Ikaruga's "Shinobi Girl's Heart" story.
Pure White Hat	Clear Day 4-6.
Rabbit Ears	Clear Day 0-6.
Rabbit's Tail	Clear Day 1-5.
Red-Rim Glasses	Clear Day 0-6.
Ryoki's Hat	Clear Day 8-9. (No purchase necessary)
Sailor Cap	Clear Day 6-5.
Sexual Harrassman	Clear Ikaruga's "Shinobi Girl's Heart" story.
Sunglasses	Clear Day 0-6.
Twist Headband	Clear Day 2-6.
White Eyepatch	Clear Day 2-6.
Wooden Bracelet	Clear Day 0-6.
Wrathful Hag	Clear Ikaruga's "Shinobi Girl's Heart" story.
Wristband	Clear Day 0-6.
Yumiverine X	Clear Ikaruga's "Shinobi Girl's Heart" story.