Dekiai Yakuza ni wa Amayakasarenai

Riko, the granddaughter of a family of Japanese yakuza, has a one-sided crush on Iori, the overprotective caretaker of the family. Iori has always spoiled, Riko; Iori's main focus has always been Riko and she's at the center of everything he does. When Riko finds out that Iori has a girlfriend, Riko decides to "leave Iori" in order to give up on her unrequited love! Riko tries her best to gradually increase the things she can do on her own, but Iori is still not satisfied?!

(Source: MangaPlaza)