Dramas where there's an older brother who takes care of his little brother/sister

I've seen (I'm in charge) Singapore 

Innocent Man 

Heart stings 

Princes prince 

 I don't care what country iNO INCEST PLS! but I like protective brothers who take care of their little siblings 

In Jealousy Incarnate the female lead has a younger brother that kind of takes care of her rather than she of him lol but he is just a side character.
Rebel, thief who stole the people has a male lead who is the older brother to a younger sister, I think.
I Remember You has a focus on two brothers......buuut it's kind of.....well...difficult.
Plus nine boys is about a bunch of brothers but I don't remember if they actually interacted a lot with each other....
The male lead in Moonlight drawn by clouds has a younger sister which I think he is also somewhat protective of.
Hey, Goblin actually had a younger sister that he was kind of protective of! Okay, now I'm grasping at straws. Surprisingly difficult to find....your safest bet for sweet family moments of any kind are usually family dramas. There will be plenty of sibling relationships to go around. I'm not really well versed in those though, I could only really recommend: What happen's to my family and second Panda's recommendation of Five enough. 
Sorry, I did my best to find some.

Yamada taro monogatari
Yasuko to kenji
Jealous incarnate
The Moon that Embraces the Sun
Kill me heal me
Stars Falling From the Sky

✔️ Reunited Worlds 

✔️ My Annoying Brother 

✔️ Hello Monster ( in part of the show) 

✔️ Scarlet Heart Ryeo ( parts of show) 

✔️ Hwarang ( secondary character takes care of brother) 

✔️ Ruler: Master of the Mask (2nd lead male during beginning of show) 

✔️ Lookout ( step- brothers) 

Adding to previous answers:

- Ugly Alert

- I'll Give You The Stars and The Moon (KBS weekday drama)

- Happy Together (1999)

- Legend of Orpheus

- Yong Pal

I'm watching Come & Hug Me and it fits what you're looking for very well!

• +1 to Come and Hug Me | Oldest brother/Younger Brother/Youngest Sister + Older Brother / Younger Sister
  
• +1 to Just Between Lovers | Older brother/Younger sister & Older brother / Younger "adopted" brother

In addition: 

I'm using red for the protective character. If both are red, it's because they are protective of each other. If one of them is in bold, that's because that character is even more protective than the other(s).

• While You Were Sleeping | Older brother/Younger Brother
• Hello, Monster | Older brother/Younger Brother
• Kill me, Heal me | (Twins) Brother / Sister
• Another Miss Oh | Oldest Sister / Older Brother / Younger Brother
• Oh My Ghostess | Older Brother / Younger Sister
•  Soul | Twin Sisters + Older Brother/Younger Sister
• King2Hears | Oldest Brother / Older Brother / Younger Sister
• The Crowned Clown | Older Brother / Younger Sister
• Cheese in the Trap | Older Brother / Younger Sister
• Devilish Joy | Older sister / younger brother & sister + Older Cousin / Younger Cousin (practically brothers).
•  Fight for my Way | Older Brother / Younger Sister (this is a small part of the drama, though)
• Gu Family Book | Oldest Brother / Older adopted Brother / Younger Sister
• It's Okay, that's Love | Older Brother / Younger Brother
• Mirror of the Witch | Older Brother / Younger adopted Sister
• Moon Lovers Scarlet Heart Ryeo | Older Brother / Younger half-Brother
• Pinocchio | Older Brother / Younger Brother
• The Smile has Left Your Eyes | Older Brother / Younger Sister
• The Third Charm | Older Brother / Younger Sister
• Weightlifting Fairy Kim Bok Joo | Older Brother / Younger Brother

Le coup de foudre Twins but he's the older one and their family brother and sister relationship dynamic along with their whole dynamic of portraying love -romantic and familial love is praised many people loved the family part of it go check it out!