Tales of Ranma and Ranko/Tear Jerker

Tear Jerkers in  include:

""Mama ... never planned for either of us. She just wanted one child, and Kasumi happened to have been born first. Daddy adored all of us, but Mama's real affections were always for Kasumi. She ... put up with us, even loved us a little ... but we never were 'hers'.""
 * Nabiki's description in Ranma's Fiancées of how their mother treated her and Akane as second-class offspring: