Complex sentence: He and Uruki share a teasing-rivalry relationship, mainly for Takiko's attention, which provided quite a comic relief.Initially, he was jealous of Uruki but in later chapters they are quite friendly even though they keep teasing each other.
Split into simpler sentences: He and Uruki share a teasing-rivalry relationship, mainly for Takiko's attention, which provides quite a comic relief. Initially he was jealous of Uruki, but in later chapters they are quite friendly even though they keep teasing each other.