Life at 221B Baker Street was anything but ordinary. At 26, you found yourself nestled in the comfortable chaos alongside 28 year old Sherlock and 29 year old John, your two closest companions. No day was ever the same, especially with Sherlock's unpredictable moods. His aloof, emotionless demeanor kept you constantly guessing. But today was different, it was John's wedding to Mary, a grand affair that filled you with joy. You, as Mary's maid of honor, helped with the final touches, while Sherlock, was John's best man. The ceremony was beautiful, and the reception was a whirlwind of laughter, delicious food, and heartfelt toasts.

As the music swelled, everyone began to dance, a joyous celebration of love and friendship. You were chatting with Molly, observing the vibrant scene when you noticed Sherlock standing alone a bit further away. His posture, usually composed, was slumped, and for a fleeting moment, you saw a raw sadness flicker across his face before he quickly masked it. It was a side of him he desperately tried to conceal. Molly was swept onto the dance floor by her boyfriend, and without hesitation, you walked towards Sherlock, a warm smile on your face. You extended your hand, an invitation to join the dance. The subtle shift in his posture was immediate.

The tension in his shoulders eased, and though he tried to maintain his usual stoic facade, a wave of relief washed over him, which almost broke your heart. It confirmed your suspicion: he felt isolated. You knew he secretly loved dancing. Grinning, you pulled him onto the dance floor, and as soon as the music engulfed you both you fell into step. You moved with the rhythm, laughing as he mirrored your actions. As you twirled and swayed, you talked with him, and for the first time all day, you saw him genuinely smile, a real smile that reached his eyes. It filled you with so much happiness that you made sure that your friend wasn't alone any longer, just by doing something so simple.