Married couple Risa Tsukitsu and her husband, troubled by his erectile dysfunction, discover an advertisement for hot springs said to enhance virility. Deciding to take a trip that also serves as a health retreat for her father-in-law, they set off hoping for a miracle. Though the famed hot spring proves ineffective for her husband, it has a surprisingly powerful effect on her father-in-law, leaving him painfully erect. As a caretaker, Risa gently tends to his needs, performing intimate relief. Her tender actions only heighten his arousal, causing him to become erect again uncontrollably. With emotions running high and desires colliding, their forbidden passions spiral into unexpected territory. #Captain P