Looking for an anime/manga, possibly completed, with a beautiful female lead. Not really into anything homosexual (nothing against it, just not my thing) or supernatural. I would love for the love story to be as natural and realistic as possibile. I don't mind drama as long as there is somewhat of a happy ending.

I really liked:
- Mars
- Oboreru Knife
- Six Half
- Chihayafuru (even though there's not very much romance)

Thanks to anybody who will help me out!

Kare Kano
Hana no Namae
Taiyou no Ie
Emma
The Other Side of The Mirror
Not ended yet but most likely gonna have happy ending: Horimiya

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DONDAKEE!!

Here are some suggestions (most of them have a light plot and mood though):

Jidokhage Kkeureoango Jidokhage Kiseuhago - Ongoing. Manhwa with the most beautiful art I have EVER seen. Beautiful female lead with delinquent male lead. Mysterious, realistic and intriguing, I highly recommend it!
Hibi Chouchou Completed. Manga about the love between two quiet people. Eye-candy art, sweet, cute romance.
Kawaii Hito (SAITOU Ken) - Ongoing. Male lead POV. Cute romance between scary-looking male lead (but extremely sweet!), and a kind, beautiful female lead.
Kusumi-kun, Kuuki Yometemasu ka? - Ongoing (shounen). Female lead is considered popular and good-looking. It's a 4-koma, but it's hilarious ! The male lead is so strange.
Takane no Hana Nara Ochitekoi!! - Ongoing (shounen). Handsome and popular male lead, but then he competes with the gorgeous female lead. The problem? The female lead is better at playing prince (even though she's beautiful!) .
Boku no Robot - Completed. Robot-like female lead with tsundere male lead.
Otokonoko ni Toriko - Completed. I don't remember much, but here you have a blushing, shy tsundere male lead with mature, playful female lead.
Sumire Syrup - Completed. Beautiful, indecisive female lead and blunt male lead.
Zenbu Chodai - Completed. About a beautiful, smart, popular, talented female lead who finally meets her match!
Teruteru x Shounen - Completed, but unfortunately it has supernatural in the second half. But I still recommend it! It has the most devoted and sweetest male lead I've ever seen, and the romance is just aww <3.
Ano Ko no, Toriko. - Ongoing. Beautiful female lead. Male lead falls in love first, and it's a love triangle between a group of 3 childhood friends.
3D Kanojo - Ongoing. Has an otaku male lead.
Kanojo ni Naru Hi - Completed. About male lead who falls in love with his childhood friend who has changed gender into a girl!

Seconding Kare Kano and Horimiya as well

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Shoujo & Romance Manga Lover || Cleaner-Typesetter

Thank you everybody for the suggestions!