1-4, 6.5-11.7. younger subordinate goes after his older boss. older boss usually goes for young and pretty guys but now he is struggling with impotence but after sex with his subordinate, he found new pleasure of sex.
5-6. about black cat who can shapeshift as human. he stays by his master's side who cannot sleep without him. other story is about white cat ordered to go pick up black cat by his master but gets insecure about the master's feelings for him.
Ren'ai Nenrei