" If I am a Tomcat animal, What will i do?"
Prisha, factually, a Tomcat is a male cat.
Metaphorically, a Tomcat is a male who goes from female to female. There is an expression, "Tomcatting around".
Tomcats are also said to sit on fences at night and "howl at the moon".
So you can write about the "adventures" of either a boy, or a boy cat, that goes from female to female.