כשאיצ'יג'ו ראקו היה ילד קטן, הוא הבטיח הבטחה לילדה קטנה שפגש. כעבור 10 שנים, איצ'יג'ו אינו זוכר את שמה או איך נראתה הילדה אך את ההבטחה הוא לא שכח. המפתח והמנעול שהחליפו ביניהם כשהם היו ילדים היה הסמל להבטחה הזו. איצ'יג'ו הוא בנו של מנהיג היאקוזה וחייו משתנים כאשר פורצת מריבה בין היאקוזה לגנגסטרים מאמריקה והדרך היחידה למנוע מלחמה זו היא לצאת עם הבת של מנהיג הגנגסטרים. מה יקרה להבטחה של איצ'יג'ו? ומי זאת הילדה שהוא הבטיח לה את ההבטחה?
קים ג'ונג סאם הופלל ברצח וקיבל עונש מוות. הוא ישב בכלא במשך 10 שנים עד שברח מהכלא. בגלל מאורעות מסויימים הוא נאלץ להתחזות לבלש הו איל סונג ולעזור לפושעים למצוא 100 מיליון דולר. בינתיים, ג'ין ג'ין יונג, נהפכה לבלשית כדי לחקור את מות אביה. מה יעלה בגורלם של קים ג'ונג סאם וג'ין ג'ין יונג?
31-year old Lin Yang is accomplished at work but does not have her own else and even her apartment was rented. In her boring life, suddenly appears 24-year old Lu Zheng An. Lu Zheng An was her neighbour who grew up with her, and has returned from studying overseas. He tries hard to enter her life, and eventually succeeds in moving into her house and intruding into her work. Lin Xiang constantly reminds herself that Lu Zheng An is a younger brother, but ultimately could not withstand Zheng An's charms. Her boring life and sleeping heart was awakened with the appearance of Zheng An, and she finds herself falling for him.
A story of urban workplace romance follows a legal intern and a surgeon who reunite as adults. They become colleagues and neighbors. As evenly matched as they are, a relationship starts to blossom.
A young couple finds their love rekindled after being separated for ten years. Lu Fei, a seemingly perfect Prince Charming unexpectedly encounters the stubborn and rebellious young lady Xin Chen. Despite their clashing personalities, they find themselves drawn to one another and eventually fall in love. However, they later separate, and it is not until ten years later, when Lu Fei lets go of his newly burgeoning company overseas and returns to search for Xin Chen, that they rediscover the meaning of their love.
Zhou Lin Lin is the type of student who is good at some subjects but fails horribly at others. Through the meticulous study plan laid out for her by straight-A student Fang Yu Ke, Lin Lin not only manages to catch up but also gains admission to the top university in the country. After school started, the plain-spoken Zhou Lin Lin accidentally gets herself into a huge mess with rising tennis star Wen Tao and Fang Yu Ke’s good friend Xie Duan Xi. She also forms a sisterly bond with her dorm mates Ye Ru Ting and Zhu Li.
Through the help of Da Zui, Lao Ding and many others, it looks like Fang Yu Ke's long-distance marathon of love has finally reached the finish line. However, Zhou Lin Lin and Fang Yu Ke encounter various tests along the way. Yet from beginning to end, for the two of them, there is only you.
Set during the 1980's and 1990's, a story unfolds about the dreams, friendships, and love of three young people.
Lee Doo-Hak (Jang Dong-Yoon) is a high school student in a provincial city. He comes from a poor family background, but he is smart and compassionate. He falls in love with Oh Jung-Shin (Seol In-A) at first sight, who is a transfer student from Seoul. Lee Doo-Hak gets involved in an unexpected case and this changes his life.
Oh Jung-Shin is always honest and confident. She is brave enough to fight against injustice. After transferring to her new school from Seoul, she forms a bond with Lee Doo-Hak and Choi Cheol-Woong (Choo Yeong-Woo).
Since Choi Cheol-Woong was a child, he and Lee Doo-Hak have been friends and also rivals. Choi Cheol-Woong is the type of person who can’t accept losing. He falls in love with transfer student Oh Jung-Shin, but she doesn’t love him.
Wiwa has a wedding shop, but has never been a bride though she longs to be one. When an accident lands her in a popular celebrity's body, is this a chance to make her dreams come true?