As the half-year deadline approaches for Tsutsun and Iroha’s relationship, Tsutsun strives to make memories with Iroha. However, Iroha reveals to Tsutsun that she is going to have an operation that will erase her memories even if successful. And with that, she disappears from his life. Left all alone and dealing with the loss, Tsutsun must look forward to his university entrance exam…! The ever popular five-year long series about the world’s weakest boy and his innocent love story comes to a dramatic end!