Complex sentence: Dōmeki is constantly seen throughout the series as an annoyance to Watanuki; he often has a sarcastic way of making Watanuki help out with his chores, and usually manages to get Watanuki to make his lunch for him.
Split into simpler sentences: Dōmeki is constantly seen throughout the series as an annoyance to Watanuki. Dōmeki often has a sarcastic way of making Watanuki help out with his chores as well as make lunches for him.