First story is real cute:
Ch. 1 - Catheterization (medical), desperation, omorashi- forced naked wetting, urolagnia
Tsuzuki had both arms and legs broken so his brother attends to his personal needs... but not without a bit of mischievous torture. He presses on Tsukuki's stomach to force him to release pee in a urinal bottle, but becomes aroused by the act. Tsukuki also begins to become aroused when his brother helps him pee.
Ani No Chuukoku