I Awaken the Label System and Go on a Rampage at a Girls' School

[Urban Fantasy + Girls' School + System of Tags + Nighttime Hunts + Flirtation with Multiple Heroines + A World Where Only I Have Magic + Wish Fulfillment] Chen Ze transmigrates to the Dragon Kingdom on Blue Star and becomes a math teacher at an elite private girls' high school. One day, he discovers he can see tags hovering over everything. Red tags mark villains. Killing them sends a warm current coursing through his body, making his strength surge as his bones and tendons are reforged and strengthened in the searing heat. Green tags hover over the girls around him. The instant a girl's heart races, the moment her cheeks flush, or the second her pale fingers unconsciously clutch the hem of her clothes, the green light turns into fireflies and slips between his brows, sending his mental power skyrocketing. The deeper their affection, the stronger he becomes. Golden tags cling to ancient books. Memorize them line by line, and he can master long-lost techniques. By day, he's the gentle, considerate Mr. Chen, surrounded by thirty-two female students. The campus belle leans over the back of a chair, swinging her slender, white-stockinged legs as she discusses Nietzsche with him. A rebellious blonde breaks a desk with one punch to stand up for him. His ex-girlfriend, now the principal, wears yoga clothes and tempts him with deadly allure in her office. Every one of them is a walking resource for his cultivation. By night, he dons a Bai Ze exorcist mask and takes up the ancient sword Chixiao, cutting down every evil in the city. A genius agent from the Ministry of State Security closes in, while foreign assassins swarm in...