I got engaged, and my close colleagues and juniors held a drinking party to celebrate me. After getting carried away and drinking too much, she is covered in mud. The person who took care of me was my junior, Nishino. Nishino is a beautiful office lady who is two years my junior and has a good reputation within the company. He admired me from the time I joined the company, and he confessed his feelings to me several times, but I refused because I was reluctant to have an office romance. Even so, she is like a younger sister to me, and even after the drinking party, she worries about me and sends me off. That's all I remember though...