Playboy kind of ML pursuing innocent/shy FL romance drama?

Tempted  exactly what u described 

Coffee & Vanilla also exact + sexual vibe

That Winter, The Wind Blows kind of, he pretends to be her brother, but there is that vibe

The Innocent Man though she isn't shy , he seduces her for revenge, but falls for her, same is in "A love to kill" but this one will make you cry lot

Before We Get Married  he is very seducive but she isn't shy

Shanai Marriage Honey  not exact but kind of same vibe with sexual tensions 

Cheese in the Trap kind of but not exactly, depends on how you see it I guess he seduces her but wouldn't say he is playboy, he is kind of phsico at list he isn't good person and I couldn't get why she loved him especially when there was other really good guy and I would say more developed as character then ML

A love to kill - revenge drama, sad (I cray very rare but cried lot) she isn't very shy but he treats her bad, she is his revenge target, very emotional drama with beautiful leads and amazing chamistry. if you will like this you may try Tree of Heaven it's not high level drama, also she is weak girl who cries all the time and annoyed me, but in the beginning chemistry was very strong, +taboo subject. overall kind of have something, you might like after "a love to kill" if you will love it....

Cruel City  - he is cold like ice, she looks him with innocent puppy in love eyes, but also she is quite seducive... she is much younger, she is cop he is criminal autority... romance isn't main theme but I saw only few romances I liked that much, + sexy chemistry. Drama is THE BEST in crime action mafia genre and one of the best Kdrama ever, if you like complex more high level dramas and not only romances, you should watch. if you'll watch it, don't search photos or videos, I mean not spoiler yourself, trust me would better ^^

Lucifer - also not romance focused but great drama (from my experience, often better romances are in non romance but good dramas, they are less cliche, less predictable), also coldest anti hero ML and nice loving FL, guy doesn't show his feelings, she does more, and she loves him even after knowing he is "bad" (these description fits Cruel City too, though in cruel city it was more romance with some relationship, in Lucifer they have more platonic relationship)

One More Time also great drama, less dark then previous 3... very real life relationship and love, they date, but he is cold and jerk bad bf, she is sweet, when he looses her then realizes how much values her... very fresh drama I mean not usual kdrama relationships.

The Smile Has Left Your Eyes  and Japanese version Sora Kara Furu Ichioku no Hoshi also kind of fits, cold jerk-ish guy, nice girl... both really great dramas.

Sealed with a Kiss  - I'm not sure but you may like, he is jerk dominant type older guy, plot in 2 words:  stockholm syndrome

Go Go Squid!  - kind of... personaly I dropped it, FL was too annoying for me and maybe because of it couldn't see chemistry or logic in their romance 

Memories of the Alhambra - not exactly also not romance focused, but another greatest drama, amazing story, acting, visual, ML... he is older, cold businessman going through second divorce, she is young nice quite innocent girl full of life, she gets crush on him from the start, he doesn't have time or energy for romance, I mean he doesn't even thinks about it, there is so much thongs going on him.... he kind of uses her. time pass they meet again and then he is also ready )))  wouldn't say it's wow romance (not even close to Cruel City's romance and chemistry, but this drama is really must watch

• Nevertheless
• You Are My Hero (he's not a playboy at all but this can fit, highly recommended)
• Devil Beside You
• Gameboys (This is a BL)
• Love O2O
• Boys Over Flowers
• Love Scenery (he's not a playboy)
• Secret Garden