Complex sentence: From Umibozu's payback promise to Kitsuneko's flirting with Ren, she becomes sad and determined to get Ren's attention back, something that she does by accident by blowing up food in the kitchen and getting herself covered in it.
Split into simpler sentences: From Umibozu's payback promise to Kitsuneko's flirting with Ren, she becomes sad and determined to get Ren's attention back. She does that by accident by blowing up food in the kitchen and getting herself covered in it.