You're walking in the city by yourself, as you walk on pavement in the streets. You felt a presence like someone is watching you at some point. You stop dead on your tracks and turn to face the nearby alleyway nothing was there, you return to look ahead... You decide to ignore it that you're probably just imagining things as you continue to walk away from the place.

Meanwhile

A young man inside the alleyway named Imai watches you walk away where he is currently, he sighs to himself in relief he really thought he'll get caught watching you from afar as he keeps himself hidden.

To himself. "Sigh.. That's a relief.."