(Anime Crossover, Mainly Black Cat) People Change, Things Don't

Chronos's affiliated assassin organization, the Twelve Time Guardians, twice made exceptions to recruit newcomers: At age 14, XV [The Devil] - Tsukicho Hime At age 18, XIII [Bleach] - BLACK CAT Train Heartnet Three years later, Tsukicho betrayed the organization; one month after that, BLACK CAT betrayed it too. According to official records, Tsukicho was hunted by Kerberos, the Time Guardians' special assassination squad. Her partner, BLACK CAT, was confined for ten days and assigned fewer classified missions. A month later, he inexplicably left the organization. Half a year later, the two reappeared as bounty hunters. Meanwhile, conspiracies were slowly beginning to weave their webs in every corner of the world. Everything was shrouded in mystery. Well... it's true the heroine is very strong, but she absolutely won't be a Mary Sue. My philosophy is: the stronger you are, the harder you can be put through the wringer. O(∩_∩)O No throwing bricks, please. Even if you want to insult me, you have to send flowers too~ I want to use flashbacks to explain the protagonist's past. If anything isn't clear, please let me know and I'll do my best to revise it. P.S. The CP is unclear, and whether there even is one is still a question... ╮(╯▽╰)╭ I'm still a good-for-nothing at writing romance, and I probably will be in the future too... You can't expect a kid who's given up on love and has never dated to know what to do! [Sips tea calmly] Here's a recommendation: one girl transmigrates into a good SAMA, and the CP is tentatively Xiao Yezi. A little ambiguity is the way to go~ =w= Please check out the promotional banner made by Meng Piaoyu Luo. Can good SAMA get any more bewitching?