After minutes of silence on the bus, you both got off near Han River.

  You sat along the edge and hugged your knees to your chest.   "It's so peaceful here." You breathed in the morning air.   Byunghun stood behind you, his hands in his pockets.     "Hyerin.." He broke his silence.     You didn't respond.     "What exactly did I do last night..?" Byunghun sounded apologetic.     The atmosphere got heavy.     "..You just.. Touched me.. That's all.." You put emphasis on the word 'touched'.   "'T-that's all'..? Hyerin.. Don't take it that lightly.. I.. I really care for you. I'm sorry for hurting you.." He paused. "I know I'm the one who did wrong.. But I swear I wasn't on my right mind.."   You nodded along at his words.   "I'm guessing that I said some things too, didn't I.." His voice got softer.   *'Noona' to be exact.* You answered him in your mind.   "I'm really sorry Hyerin. If you want, I can apologize as many times as you want me to. Just please.. Talk to me." He walked up closer to you. "I regret what happened that night. I really do. I can't believe I was so stupid.. I would do anything to turn back the time."     You kept your silence.      "Hyerin.. Jeongmal mianhae." He knelt down from behind you and wrapped his arms around your shoulders. "So go ahead. Ask me anything.. I'll be completely honest with you."   You flinched at the contact. Your mouth started to quiver and your eyes started to form tears.   *I can't run away from this now..*   ".. 'Noona'.. Who is she.." A tear escaped your eye.   Byunghun felt pain strike his heart.  He sat down, back to back with you.       You prepared yourself for what was coming.       "Im-seonsaengnim.. She.. Was my ex.." Byunghun sighed.   *Seon..saengnim?*   His hand found yours and gripped it.   "You know, our homeroom teacher?" He softly said.   You slightly nodded.   "We were together since my last year of junior high. I was 15 then. She was a university junior and my home tutor."     *Flashback*   His POV   "Son, what happened? Why did your marks drop?!" Abeoji scolded me as he saw my report card.   "..I just don't feel like studying all the time." I shrugged and slid my hands into my pocket.   "If this goes on, I'm gonna have to hire a tutor for you then!" He raised his voice.   "Abeoji, I have a life too! So what if I don't-"   "This is for your future Byunghun! I don't want to see you living in such hardship in the future! Not..like me.." Abeoj's words shot me through my chest.   *He may be right..*   "Tch.."         Then next day after school, I came home to find a girl sitting across the couch from Abeoji.   "Who's she?" I scoffed.   "Ah, yo