Hiroto Yamada is a high school student with practically no presence and absolutely no communication skills. While his classmates are choosing groups for their school trip, Hiroto suddenly finds himself transported to another world. Given the opportunity to return home immediately or remain in the fantasy world until the Demon Lord is defeated, Hiroto is initially ready to leave. Then he witnesses a successful Hero surrounded by beautiful women and realizes something important: maybe this is finally his chance to live the overpowered harem fantasy he could never achieve back home. Fortunately, Hiroto has received the cheat skill "Stealth," allowing the perpetually unnoticed loner to erase his presence and slip past enemies with ease. Armed with a power perfectly suited to someone nobody noticed in the first place, he sets out to defeat monsters, become an adventurer, and surround himself with beautiful companions. There's just one problem. A cheat skill can make Hiroto invisible to monsters, but it can't magically give him social skills. Whether he's encountering beautiful mages, hungry female warriors, sexy clerics, or powerful monsters, Hiroto's greatest enemy remains the same one he faced on Earth: actually talking to people.