Rei, a full-time housewife in her second year of marriage. She had been living peaceful days with her husband who worked for a foreign company, but suddenly he was assigned overseas. Rei decided to accompany him and started taking private English lessons. However, after learning about her husband's infidelity, the advances of her proactive black instructor crept into the void in her heart――. A forbidden giant dick cross-cultural lesson that reason can't resist starts now!
