How miserable is it for a straight guy to transmigrate into an ABO world? Especially when he’s the adoptive older brother of a restricted □□ game’s harem protagonist! Yino: (Despair) So my mission is? System: (Serious) Protect the protagonist’s virginity. Yino: … As the supporting character guarding the delicate flower, Yino is forced to enroll in the empire’s top military academy, filled with elite alphas and omegas. Not only does he have to worry about being bullied as a beta, but he also has to protect his fragile little brother’s body at all costs! An alpha invites his brother to dance? He rushes over with a smile: "My brother has weak legs. Let me step in instead." An alpha wants to sit with his brother? He squeezes in: "Sorry, we’ve been attached at the hip since childhood. Separating might cause an accident." An alpha tries to hold his brother’s hand? He blasts a campus-wide announcement: "Excessive indulgence is harmful. Safety first, everyone." And then… Eventually, an alpha loses their temper, grabs his collar, and raises a fist—only to freeze mid-swing. The alpha narrows their eyes, leans in, and sniffs his neck: "Why do you smell so good?" Yino, horrified: "Please don’t say such terrifying things!" From then on, everything spirals into chaos. The admirers who were supposed to obsess over his brother inexplicably turn their attention to him, their gazes scorching with hunger. As a straight man, Yino is utterly bewildered. But at least his brother is safe—mission accomplished! Once the task is done, he can escape back home! …Until he realizes the protagonist he painstakingly raised—once a delicate, aloof beauty—has grown into a stunning, nearly two-meter-tall, blond, blue-eyed hunk. Yino: Hold on… Since when can omegas be two meters tall?! Before he can figure it out, the towering young man pins him to the bed, gripping the back of his neck: "Big brother… who else are you thinking about?"