Yijeong unexpectly sees Gaeul on the street and helps to revenge her bad boyfriend. Jandi clears up her misunderstanding about Junpyo, and the two go out on a date on Valentine’s Day. They bump into Junpyo’s mother, and Junpyo tells her not to do anything bad to Jandi.
The mother, who doesn’t even think of F4 as the friends of Junpyo, starts her next action to cut Jandi off from Junpyo as she thinks Jandi is ridiculously improper to her son.
Le jour de la Saint-Valentin, certains osent avouer leurs sentiments cachés. Comme la blanchisserie familiale est en difficulté, Jan-di commence un nouveau job.
因為外界評判和家事煩憂的易正在路上偶遇了佳乙。對傷了佳乙心的壞男人，易正精彩的還擊。
另一邊，拳打佳乙的男朋友後失蹤了的俊表和消除了誤會的絲草，在情人節那天再次出來約會。
另一邊有把握確定絲草心意的俊表暗中為絲草準備巧克力，在給出之前被姜會長撞見。
感覺到俊表不對勁的姜會長雖然說打算放絲草一馬，仍然不能把絲草看成是和F4一樣、兒子的朋友。
對姜會長來說，絲草只不過是家境差的存在。結果正式發起了阻攔攻勢
En el Día de San Valentín se revelan sentimientos ocultos. La empresa de la familia está en serios problemas, y Jan-di decide aceptar otro trabajo.
Yi Jung recebe uma ligação histérica da mãe, que está ameaçando cometer suicídio por causa de seu pai.
O dia dos namorados traz à tona sentimentos escondidos. Com a lavanderia da família em apuros, Jan-di resolve procurar um emprego.
