Players are encouraged to costume in fabulous outfits. After all, your clothing reflects who you are. It is not unusual for students to dress in anything from fabulous Victorian corsets to tuxedos to military uniform to business suit to 20's swing dress to the normal gukuran (boys uniform) and seifuku (sailor outfit).
The school actively encourages this, allowing extremely wide liberties with the school uniform.
Club members are also allowed to wear anything approved by their club. The Fashion club, the History club and the Drama club all have a long standing rivalry for the most beautiful costumes. If they have any foreign ancestry students are also allowed to wear appropriate national dress.
Costuming is rewarded by an in game bonus.