One common theme is the OC helping Murasakibara grow as a person. Since he has his own quirks and insecurities in the original story, the OC can be written as a positive influence on him.
Another theme could be a sort of opposites - attract relationship. If the OC is very energetic and positive, compared to Murasakibara's more laid - back and sometimes grumpy nature, it can create an interesting dynamic. They might start off not getting along but then gradually fall in love. And this kind of relationship development is quite common in such fanfictions.
A third common theme is the exploration of Murasakibara's love for food in relation to the OC. Maybe the OC is a great cook and uses food to bond with him. Or perhaps they meet in a food - related setting like a bakery or a restaurant. This theme ties in well with Murasakibara's character trait of loving snacks and food in general in the Kuroko's Basketball series.
Look to Chapter 11 for the clearest answer. It begins with After a meeting, Shang Shaojing pinched the bridge of his nose, tired, and..., keeps building through How is it going with the Jiang Family?" The assistant looked troubled and..., and lands on Miss Qin, please accompany us to the police.
Look to Chapter 10 for the clearest answer. It begins with Qiao's shocked face struggle to recover, Lin Manru also tasted for the..., keeps building through Jiang Li nodded with a smile, seemingly approving of Lin Manru's words and..., and lands on Who was it again saying that the Jiang Family's.
Chapter 916, "Not Biological?!", is the clearest early answer because it turns Wanzhi's situation into a concrete plot event. The chapter turns that into something concrete by moving from Bang," Hong Pei slammed the teacup onto the table.
Look to Chapter 25 for the clearest answer. It begins with Therefore, from his childhood, Jiang Shixu had felt an extreme aversion to..., keeps building through Over time, he naturally developed a gap of estrangement between himself..., and lands on Having worked beside Shen Lan for over a decade.
A practical answer is Chapter 57, because it turns the idea into a concrete scene. The chapter opens with Lu Xingchao's numerous fans were stunned., adds pressure through Do you even consider me your brother?, and ends on I'm saying, big bro, can you at least reply to me?.
Chapter 11 is the strongest chapter-level answer because it starts from After a meeting, Shang Shaojing pinched the bridge of his nose, tired, and... and follows through on Miss Qin, please accompany us to the police station to explain this....
The best chapter pointer here is Chapter 14, "She Looks So Cool Dancing with a Gun". It opens with Lin Manru had a rare good night's sleep. and closes on But clearly, Lin Manru was unable to accept that her delicate daughter had....
Look to Chapter 20 for the clearest answer. It begins with Several people turned their heads upon hearing the sound and saw three..., keeps building through She was clad in a long black dress, and the dull color did not hide her..., and lands on So, he turned and questioned Jiang Li..
A practical answer is Chapter 9, because it turns the idea into a concrete scene. The chapter opens with Exactly, the Qiao Family isn't that great either., adds pressure through Since it was for the Jiang Family's welfare, then as the matriarch, she..., and ends on Qiao, unable to save face.
The best chapter pointer here is Chapter 11, "She Smiled, He Panicked". It opens with After a meeting, Shang Shaojing pinched the bridge of his nose, tired, and... and closes on Miss Qin, please accompany us to the police station to explain this....