After Healing the Gloomy, Pitiful One

[Guide seme x Sentinel uke] Lu Jing is a corporate wage slave. His greatest wish each day is to retire early and spend his life doing nothing. His ten-year contract with the White Tower has finally ended. Lu Jing thinks he can finally retire in style, but his boss calls him in for a talk. "Here's the thing. You're the most powerful guide in the Tower, so we'd like to rehire you for another ten years. We'll double your salary. What do you say?" Lu Jing smiles. "No way in hell." His boss smiles too. "A few days ago, the Tower brought back an S-rank Sentinel from a prisoner camp. He's close to death, and apparently he's your ex-boyfriend. Want to go see him?" Lu Jing: "..." Oh, for crying out loud. Four years ago, Lu Jing suffered the agony of a soul-splitting bond when his Sentinel broke up with him, forcibly severed their mental bond, and ran off with a blond guide quite a bit younger than himself. When Lu Jing sees him again, the Sentinel is curled up in the corner of a soundproof room, barely alive. Beside him is his spirit beast, unable to retract because his mental domain is damaged. His boss says, "What a shame about this S-rank Sentinel. We could have persuaded him to work for the White Tower, but we contacted every high-level guide we could reach and none had a compatibility rating above fifty percent. Looks like only you, his ex-boyfriend, can save him." Lu Jing says coldly, "You do realize he's my ex-boyfriend." His boss grins. "If you work for the White Tower for another ten years, we'll give him to you. How about it?" Lu Jing: "Get lost. Throw him out. Whoever wants him can take him." [Guide-Sentinel 1v1, both are sexually inexperienced, they dote on each other. He didn't actually run off with the blond guy; this will be explained later.] The central theme: Strive to improve.