goshujin-sama to kemonomimi no shoujo meru
ご主人様と獣耳の少女メル ご主人様といっしょ ご主人様とわたし ご主人様となつやすみ
Onee-loli manga by Itou Hachi that began in 2015 and concluded in 2018. It began as a one-shot, "Goshujin-sama to Watashi", but got turned into a three volume series in 2016.
