
So this isn't from me, I haven't read the novel, but someone who did spoiled this on a forum:
1. MC is an unreliable narrator, the person who spoiled this didn't elaborate much, but they said the narration about how he lost his first partner and got injured himself isn't exactly how it happened and that this isn't the only situation.
2. I don't know if this was omitted in the manhwa or if it appears later but apparently the military really fvcked our MC up: "anesthesia for two of the most painful surgeries a person can have was refused to MC. Pain meds after for recovery and rehab was an absolute no. MC sat through his friends funeral in so much pain he doesn't remember anything . . . he goes to a psychologist for depression meds. No surprise here, they give him multivitamin pills instead. . . . he starts self-medicating with alcohol"
3. initially MC's "retirement plan was to go sit on a beach somewhere and wait for a storm. Then he would 'accidentally' drowned. That way no one could prove it was on purpose. Let's call that his eternal retirement plan."
4. HUGE FVCKING SPOILER ABOUT THE STORY'S ANTAGONIST: so apparently, MC's original partner was alive and is the one who attempted to kill and eventually later killed MC.
https://www.novelupdatesforum.com/threads/%EC%96%B4%ED%94%84%EB%A1%9D%EC%8B%9C%EB%A7%90-%EA%B0%80%EC%9D%B4%EB%93%9C-approximal-guide.185816/