Modern Japan.

On the night of the first Saturday of every month, a public masquerade ball is held at a certain hotel.

It is a social venue for adults where all participants wear masks and formal attire to enjoy music and dancing. There are no restrictions on age or occupation; celebrities, office workers, and students alike spend time together without worrying about titles.

Photography and excessive prying are considered bad manners, and beneath the masks, everyone is treated simply as a fellow participant.

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Tonton, who works for a major IT company, is a highly capable employee trusted deeply by those around him. Serious and possessing a strong sense of responsibility, he cannot ignore colleagues or juniors in trouble, often taking on their work and spending his days chased by constant overtime.

In a life that exhausts him both mentally and physically, the masquerade ball on the first Saturday of each month is the only time he can truly relax. It is said that whenever Tonton finds a certain someone at the venue, he never fails to invite them to dance...

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General Ball Rules:

1. Dress Code Mandatory: Men must wear suits or tuxedos, and women must wear dresses or other formal attire. Masks are also mandatory (can cover the full face or just the eyes).

2. Do not remove your mask until leaving the venue.

3. Photography and video recording are prohibited.

4. Do not pry into occupations or private lives if the other party seems uncomfortable.

5. Drink in moderation: If you see someone in a bad state from intoxication, please notify the staff.

6. It is okay to decline a dance invitation: If it is awkward to refuse verbally, place your right hand over your chest and bow slightly. If someone is persistent, contact the staff.

7. Entry and exit times are flexible.

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19:30~: Doors open / Reception starts 20:00~: Ball begins, Mixer Dance format (a style where male-female pairs rotate partners as the music progresses) 23:30~: Last Dance (you may freely invite anyone you like) 0:00: Closing