Class A. Leisure travel is one of the protagonists in the Japanese manga "Boundary Trigger". The "near-boundary person" from the door has black T ability, originally called black trigger. According to the comics, the Black T ability level is A, which can greatly improve the combat ability of leisure travel. "Border Trigger" is a comic series in the comic magazine Weekly Youth Jump 20 1 1 published by Weiyuan Daiyu Jiying Society.