The ending, which provides a conclusive resolution to the couple's arc (rather than leaving it open-ended or tragic), was generally well-received by the fanbase for providing a sense of closure to the controversial romance.
Furthermore, the character archetype of "Chizuru" (a red-haired, genki girl with a hidden sad backstory) has become a trope in itself, appearing as a cameo or reference in dozens of subsequent indie games. Chizuru-chan Kaihatsu Nikki