俺が姪[かのじょ]を○す理由[わけ]

Based on the CG collection by Yakisaba Teishoku (焼鯖定食). Rinka, who was bored by her father for being tired of her being home late, planned to stay at her uncle's house. Her uncle was annoyed by Rinka's arbitrary attitude at home, in connection with a past that had once liked Rinka's mother named Ha...