Fault!!
Description
Fault!! is a Japanese adult visual novel centered around a tennis club. The player controls Shuuichi Sugiyama, a student who likes to play as part of the tennis club at school along with his little sister, Mio, and the pretty and outgoing Ai Saeki. When Ai takes care of Shuuichi after he injures himself in an accident, Shuuichi notices that Mio is jealous of Ai's closeness to him, realising that his little sister has feelings for him which are more than just platonic.
The game features multiple endings that can be achieved depending on the player's decisions.