Overview： Yuina,who got lost in the world of succubi,trains with Saccu,a succubus who has lost her body,in order to return to her original world. Training means increasing her powers as a succubus,which means doing naughty things. Yuina is embarrassed by the training but manages to complete it,but one day she hears that Ishe,the tool shop owner,is in trouble and heads to Gaia Mine to help her. There,she finds some miners who have lost their motivation. "All right! Yuina,it's time to train!" What should Yuina do to bring back their motivation? Succubus are the allies of working men... In order to return to her original world,Yuina,a tomboyish girl who acts like her big brother,also trains to become a succubus! The miners are thrilled by Yuina's awkward sexual techniques.
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