The Protagonist's Useless Brother

[A/N: No SMUT.]I died from overwork as a life coach. I got transmigrated into a fantasy novel.Standard stuff, right? Wrong.I woke up as the useless older brother of Theodore, the dense, battle-obsessed protagonist of "Destiny's Harem Knight."The world is doomed to fall to a Demon Lord unless my brother forges alliances by marrying his four destined heroines.My mission is simple: use my life coaching skills to guide my romantically-challenged brother and save the world.The problem?My "help" is working a little too well... on the wrong person.Now, his stoic teacher, his fiance's powerhouse sister, his rival's legendary mother, and a 500-year-old elf are all looking at me with hearts in their eyes.I've accidentally stolen my brother's entire harem, and in the process, I might have just doomed us all.If you are enjoying this novel and want more chapters [BONUS], do these and you will get as much as you want.