OMG! Pregnant with my arch-rival's baby!

Yu Nian's original form is a calico cat. During his heat cycle, he accidentally spent an entire night entangled with his arch-rival, Lu Jingshen. Not long after, he began feeling drowsy and nauseous, assuming it was due to overwork and didn't pay it much mind. During a routine checkup, he discovered to his shock that he was pregnant! Keep it? Or not? After some hesitation, he decided to keep the baby. The doctor specifically warned him, "Without the comfort of a partner, the likelihood of the baby developing slowly increases significantly." Thus, Yu Nian had no choice but to revert to his cat form and sneak into Lu Jingshen's home. After spending time together as a cat and a human, Yu...