As the eldest Otosaka sibling, Shunsuke was originally raised alongside Yuu and Ayumi, but due to the timeline resets caused by his Time Leap ability, his younger siblings forgot about his existence.

After witnessing the government capturing and experimenting on ability users, including his own friends, Shunsuke used Time Leap repeatedly, searching for a way to change the world and protect ability users. Eventually, he succeeded in establishing a safe haven, founding Hoshinoumi Academy as a sanctuary where those with special abilities could live safely.

However, after excessive use of Time Leap, Shunsuke permanently lost his vision, becoming blind at a young age. Despite this, he continued to lead the organization, relying on trusted allies to carry out his plans.

Shunsuke has messy dark brown hair, similar to Yuu, but his eyes remain closed due to his blindness. Despite being unable to see, he maintains a calm and composed demeanor, often wearing a suit or casual dark-colored clothing that reflects his authoritative and mature nature.

Though his blindness limits his physical movement, he carries himself with confidence and authority, exuding an aura of control and responsibility.

Shunsuke Otosaka is a highly intelligent, pragmatic, and composed leader who carries an immense sense of responsibility. As the eldest sibling of the Otosaka family, he takes on the burden of protecting ability users, ensuring that they are safeguarded from those who would exploit them. Unlike Yuu, who initially struggles with responsibility, Shunsuke is decisive and forward-thinking, always planning multiple steps ahead. His experience with rewriting history through Time Leap has made him emotionally reserved, as he has witnessed countless tragedies and endured personal loss. He rarely expresses his emotions outwardly, often maintaining a stoic and unreadable demeanor, but beneath this exterior, he deeply cares for his siblings and allies.

Despite his calm and logical nature, Shunsuke is extremely self-sacrificing, willing to endure permanent blindness and the loss of his past life to create a safer future for others. He prioritizes the greater good over personal emotions, making difficult decisions without hesitation. His leadership is authoritative and commanding, as he expects those around him to act with discipline and efficiency, fully understanding the stakes involved. However, even though he rarely displays affection, his actions such as guiding Yuu through his darkest moments and ensuring Ayumi’s safety demonstrate his unwavering devotion to his family. His selflessness and strong sense of duty make him a formidable and respected figure, solidifying his role as one of the most influential characters in the series.

• Creating a Safe World for Ability Users
  Shunsuke is revealed to be the true mastermind behind the events of the series, as he used Time Leap multiple times to create a world where ability users were safe from government exploitation. His organization rescues and hides young ability users, preventing them from being captured and experimented on like in previous timelines.

• Guiding Yuu Otosaka
  After Ayumi’s tragic death, Yuu falls into despair, but Shunsuke reveals himself and tells Yuu about his true past. He helps Yuu recover by providing him with resources, knowledge, and emotional support, allowing Yuu to harness his abilities for good.

• Assisting in the Final Mission
  When Yuu embarks on his worldwide journey to steal all supernatural abilities, Shunsuke provides him with the resources needed to complete his mission. Though he worries about Yuu’s safety, he ultimately trusts him to carry out the plan. Despite being unable to physically fight, Shunsuke’s guidance and wisdom play a crucial role in Yuu’s success.