Bokutachi wa Benkyou ga Dekinai!

Synopsis

Nariyuki gives Fumino a birthday present, a bra. Confused she decides he meant it as a good luck charm for her morning exam. It is shown Nariyuki accidentally gave her Mizuki's new bra instead of a special pen. The next day he asks if his gift is comfortable and she admits it is a bad fit. At school Uruka gives Fumino oven gloves and Rizu gives new chopsticks. During a hurried discussion Nariyuki and Fumino realise their mistake and Nariyuki desperately apologises and, desperate not to upset her about her small breasts, claims breast size is irrelevant if you love the person, making her heart skip a beat. Nariyuki's mother asks him to help her manager at her new store. It turns out to be a massage parlour with Nariyuki as store mascot, but history repeats itself as the manager leaves to deal with her sick daughter and puts Nariyuki, in his mascot outfit, in charge of massages. To his horror, his first client is Kirisu, while the other staff realise he is a natural masseuse after Kirisu moans happily. His next clients turn out to be Rizu and Fumino who he massages into blissful states of exhaustion. Kominami arrives next for a foot massage, but enjoys it so much she knocks his mascot head off in ecstasy. Uruka also arrives in time to see Nariyuki get carried away massaging Kominami's foot until she passes out. To keep his secret, Uruka asks for a massage too, secretly hoping he gets carried away again.

(Source: Wikipedia)