As spring turns to summer, the drama special "The Big Brother Who Moved in Next Door" returns with its second episode, depicting the beginning of a new romance. The protagonist, Kengo, has long harbored deep feelings for the young man next door, but those emotions have now transformed from pure affection into overwhelming desire and lust. One day, while taking out the trash, Kengo unexpectedly runs into his neighbor. His eyes are immediately drawn to the soft, fluffy bulge in his big brother's thin briefs—a sight he can't unsee. Noticing Kengo's gaze, the older boy begins teasingly building a sexual tension between them. By the end of that day, on their way back from dumping garbage, they meet again on the emergency staircase, where Kengo can no longer restrain himself and they engage in an intense sexual encounter. That night, Kengo sneaks into his big brother's room to spy on him. The older boy notices him but instead of stopping, he provocatively begins masturbating in front of Kengo. Mesmerized, Kengo watches intently, only to be sexually played with again on the spot, overwhelmed by pleasure. From that moment on, the door to his big brother's room remains unlocked—for Kengo alone. A new, intimate relationship has begun to bloom between the two.