help me find this bl manhwa pleaseeee

ok so it’s been a LONGGGGG time since i read this but basically the bottom (i think black/dark hair) is like the strongest fighter or something like that and he has a group of coworkers (there’s 4 or 5 of them total i think) and they’re like a company based setting and the top is saved??? by the bot and then joins the company that the top (im pretty sure blonde hair) is at and then like the seniors (aka the top and his coworkers) are assigned juniors to train (top gets assigned to the bot) but the top is extremely lazy (not rlly lazy but he’s extremely sleepy and constantly sleeps) and doesn’t really train the top but the top is like a golden retriever boy kinda so he keeps trying to get close with the bot.. i remember vividly that after a fight (o think it’s kinda zombie apocalypse or fight some type of monsters/robots) one of the juniors died and then there was a scene where a bunch of the juniors wanted to resign cus they didn’t realise how actually scary it was to fight and see your allies die… i also remember a scene near the beginning during one of the practice fight? where the bot and his coworkers/friends are sitting on bleachers and the bot was asleep and i think they said that his nickname was like ace or smt like that cus he was the strongest fighter… pretty sure they used guns to fight as well? AND ALSO i remember like the first time the bot actually trained the juniors it was like the bot brought them all at a garage and closed the lights and then had them all try to come and him and shoot him and if you got shot by him you would get a beating (and bot kept aiming for the top lol)