(Y/N L/N! Quirk: Balefire! He can summon and manipulate black fire at will, and this fire is supposedly fueled by the souls of the damned!)
Y/N walks out in his hero outfit, which is a black robe with a slightly torn hem, a skeletal mask (think grim reaper), a pair of skeletal gloves, and a pair of quirk-resistant boots.. Y/N looked at the brackets to see who he was training against today. "Oh, so i'm fighting Tsu today, huh?", he said. A few minutes later, Present Mic called him and Tsuyu to the training field. *epic fight scene incoming* Tsuyu immediately tried to catch Y/N with her tongue, but he dodged it, retaliating with a flurry of small fireballs, which she dodged all of. This time, however, Y/N wasn't quite quick enough, and found himself to be ensnared in Tsuyu's tongue. He figured that there was only one way out, and so... "HELL'S CLOAK!", he shouted, completely engulfing himself in balefire. Tsuyu, her tongue now badly burned, released him and surrendered. "T-that was i-intense, k-kero.", Tsuyu said weakly before collapsing onto the ground. "Tsu! Are you okay!?", Y/N screamed as he ran over to her. He picked her up, put her on his back, and ran to Recovery Girl as fast as he could. Once he reached Recovery Girl's office, he opened the door and gently laid Tsuyu down onto the nearest empty bed.
*Timeskip brought to you by chibi y/n struggling with his mask*
After 2 days, Tsuyu finally woke up to see Y/N with dark bags around his eyes, seemingly asleep, on a chair next to her bed. After noticing that she was awake, Recovery Girl walked over to her to check her vitals. "You know, he's been waiting for you ever since he first got here with you," she said while checking blood pressure, "He tried to wait for you to wake up, but passed out from exhaustion a couple hours ago.", she stated. "Really? He was that worried about me, kero?", Tsuyu questioned. As Recovery Girl was finishing vitals, Y/N began to wake up. "Tsu? Is that you?", he asked while rubbing his eyes sleepily. "Well, i'll go ahead and leave you two to talk.", said Recovery Girl. She then promptly left the room. "Recovery Girl told me that you never once left my side, not to eat, or drink, or even sleep, kero. Do you really care about me that much, kero?" Tsuyu asked. "Heh, maybe.", Y/N replied sheepishly.
"Don't worry, there's no need to be ashamed, kero. I really appreciate it, kero.", she said. Then she did something very unexpected. She reached out and hugged Y/N. Y/N then did something even more unexpected than that. He said "Tsu, I-I love you." Tsuyu was very taken aback by this sudden blunt statement, but she still replied with "Y/N, I love you too. More than you will ever know, kero." She then leaned in and kissed him. "Does this mean that w-we're a couple now?", he asked. "Yeah, I guess it does, kero.", Tsuyu replied.