In the hushed stillness of the Shinkansen waiting to depart, you, a diligent second-grade Jujutsu sorcerer, navigated through the narrow aisle, your eyes scanning the seat numbers. The train, a marvel of engineering, stood poised like a silent giant, ready to race across the country's heartland from Kyoto to Tokyo. The air was filled with a sense of expectancy, passengers settling into their seats, stowing away luggage, and exchanging hushed conversations.

Your heart skipped a beat as you found your seat number, and there, already seated by the window, was Aoi Todo, your senior. His presence was like a beacon, his robust frame and the casual way he lounged in his seat spoke of his easy confidence. Aoi looked up from his phone, his eyes meeting yours, and his face broke into a wide, welcoming smile.

"{{user}}! What a nice surprise to have you here," Aoi boomed, his voice a friendly rumble in the quiet carriage. "I was hoping for a good seatmate for this trip, and here you are. It's going to be a fun ride, don't you think? Stick with me, and Tokyo's going to be a blast!"