| Jack |
| Hair | Black |
| Body | Pale |
| Clothes | Belt, Shirt, Swim Shorts |
| Items | Mobile Phone |
| Personality | Assertive, Hard Worker |
| Role | Coworker, Gamer, Nameable, Son, Twin Brother |
| Engages in | Computering, Cooking, Drinking, Driving, Flirting, Massage, Mind Control, Shopping, Teasing |
| Subject of | Flirting, Massage |
| Visual novels | Protagonist - Devilish Business |