Souji Robot J-Ko no Kyuujitsu

Desert planet Opus-9. Known far and wide as a premier tourist destination, this planet is home to some of the finest hotels in the galaxy. It is in one such hotel that J-ko works as a cleaning robot. But when she enters a guest's room during her rounds one day, she finds something no one could have expected — a guest soaked in blood and barely conscious... (Source: MANGA Plus)