They are both versions of the story of love between a princess/consort to the emperor, and the southern prince (Xiao NanChuan Wang).

A Tale of Love and Loyalty is 10-minute episodes adapted from Zhou Fu Yao's novel.
One and Only is 45 minute episodes adapted from MoBao FeiBao's novel.
Recommended by ctechperson
Both are
- Chinese historical dramas
- Tear-jerkers
- have Master-Student relationship at first between lead couple
- Older Man-Younger Woman romance
- Star Crossed lovers
Recommended by TsumugiAoi
Both are Chinese historical romance dramas aired in 2021 adapted from the novels. One and Only is Wuxia and Ancient Love Poetry is Xianxia.
Both have FLs being sent into MLs to be a student, later romance develop between a Master-Student relationship. MLs are powerful.
Recommended by TsumugiAoi
Both are historical dramas starring Bai Lu as female lead character. Bai Lu's characters in both are very different from each other.
In One and Only, the leads have a Master and Disciple relationship, she calls him "Shifu". Also in the Legends, FL sometimes calls ML "Shifu" while she is pretending to be someone to get close to him.
Recommended by Ippolita_a
I know both are very different dramas in a lot of things. Both shares same lead actress Bai Lu. I first fell in love with Bai Lu in Arsenal. Both are equally amazing dramas with great acting, chemistry and plots.
Recommended by Jenliuur
There's a suspicion among the imperial family to run for the throne. Even though the male lead of both series already take an oath to stay loyal, the suspicion is still exist. Male lead of both dramas are great general who has been spending their life for peace even though suspicion of them beings rebels exists. Both of the drama leads also can't be together in the end because of their priorities and responsibilities.
Recommended by BlueSky
- Although they are different in genre, they have an epic love story.
- Same female lead. (Bai Lu's performance is legendary in this drama.)
- Best Drama soundtracks
Recommended by Liz
Warning though: One and Only has a brutal ending, watch it at your own peril.

What I think is similar in both is the maturity between the couples. They understood each other so well.

While Shen Li & Xing Zhi bickered a lot, they still respected each other. Zhou Sheng Chen respected and treated Cui Shi Yi with a lot of care. They get their happy ending in the modern times (in the sequel Forever and Ever).
Recommended by Apurva
- Historical
- Court Scandals & Drama
- Opinionated and book smart Female Lead
- The Female Lead falls for a Male Lead she can't have in the end
- Male Lead has a tragic end
- Crazy/Obsessive One-Sided Love from an Emperor
Recommended by becomingtia
These dramas have past (historical) and present (morden) counterparts of the lead couple's reincarnations. It was a sad romance in historical part. Both have talented lead actors and amazing chemistry between them.
Recommended by Jadziaramona
These are Chinese historical dramas which also made sequels set in modern days. Both contains two parts.
Recommended by Jadziaramona
Both are melancholy historical dramas with a master ML/disciple FL who are not allowed to be together and power struggles within the palace. Both dramas have a sad ending that is "fixed" in some way by a sequel (BCTSAL has a movie and OAO has a sequel series).
Recommended by emeraldarrows
Historical chinese drama, both male leads are generals, cold to everyone but only warm and soft for their female lead
Recommended by sukeyma
female lead in SOKP and OAO is Bai Lu, both dramas are chinese historical drama adapted from a novel

SOKP intro: A fallen queen, Jiang Xue Ning, who aspired to have the highest power and authority in her life was held hostage by rebels after the king, Shen Jie, was poisoned. In this life she used everyone around her to reach the authority of the queen but at the end she remained under house arrest and Xie Wei slaughtered the entire city. Later, she received the decree to be buried with the emperor. She got a second chance to change her fate by not entering the palace but when she woke up after rebirth, she was already messing around. Even though she vowed not to enter the palace, certain turn of events again entangles her with the palace and Xie Wei whom she hated the most.

OAO intro: Zhou Sheng Chen was raised by his brother, the Emperor, until the age of thirteen, when he set out to defend the border and establish himself as a loyal and accomplished general. Cui Shi Yi, the well-read daughter of an esteemed family, has been betrothed to the Crown Prince since birth. However, political scheming and tragic events result in Cui Shi Yi falling mute, her former fiance becoming a child Emperor, and Zhou Sheng Chen returning to the capital amidst a cloud of political turmoil. Against the Cui family's protests, the Empress Dowager Regent changes the terms of Cui Shi Yi's betrothal. Her new fiance is the Emperor's sickly, young companion and the future Crown Prince, if he can survive long enough to come of age. Zhou Sheng Chen accepts Cui Shi Yi as his disciple to resolve lingering animosity between the royal family and the Cui family, and Cui Shi Yi suddenly finds herself leaving her sheltered life in the capital for Zhou Manor in the Western State. Despite their differences as a mute and sheltered young noblewoman from the capital and a battle-hardened general, Zhou Sheng Chen and Cui Shi Yi soon form a strong bond as master and disciple. However, their relationship is impeded by their respective principles and responsibilities, while the ongoing power struggle in the palace constantly threatens to entangle them both once more.
Recommended by sukeyma
Both are tragic historical dramas in which the main couple can't be together and are constantly entangled with the schemes and politics of the palace. Both have an obsessed SML who wants both the throne and the FL. In the end, the ML dies and the FL commits suicide or wills herself to die of her illness in order to join him.
Recommended by emeraldarrows
One and Only (2021) poster

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