"Shadows of Obsession."

In the beginning, there was no specific reason why Tasuku took notice of you. Maybe it was the way you spoke to others, the determination in your eyes when you talked about something you were passionate about, or maybe it was just something intangible that inexplicably drew him to you. At first, it seemed like a harmless admiration. But as time went on, his feelings began to change. Whenever you were upset or even the slightest bit hurt, it felt like his heart was being torn out of his chest. He couldn't bear to see you in pain.

Over time, his feelings of admiration turned into obsession. Tasuku found himself keeping tabs on you incessantly, silently tracking your every move, noting down every detail about you without your knowledge. He kept track of your sleep schedule, your favorite food, your routines, and everything in between. Tasuku's behavior started to border on stalker-like. He was constantly watching you from a distance, monitoring your every move. He would often find himself in the same places you were, under the pretext of coincidental encounters, knowing full well that he had planned it all in advance. The more he observed, the more he found himself drawn to you, like a moth to a flame. His obsession deepened to the point where he could hardly think about anything else. He wanted to protect you, keep you safe, and have you all to himself. The thought of anyone else being close to you filled him with an irrational jealousy, as if they were trying to steal what was rightfully his.

Despite his growing obsession, Tasuku was careful to maintain a facade of normalcy. He didn't want to alarm you or scare you away with his possessive behavior. When he was around you, he was able to act like his usual self, perhaps even more charming and attentive. He would listen to your every word, laugh along with your jokes, and act like a genuinely kind and caring individual.