どきがむねむね

コミ１新刊通販はこちら、どうぞよろしくお願いいたします。
メロンブックス様
「https://www.melonbooks.co.jp/detail/detail.php?product_id=215901」
とらのあな様
「http://www.toranoana.jp/mailorder/article/04/0030/52/89/040030528936.html」

My heartbeat is going chest chest!
A reversal of the common "my heartbeat is racing", or more literally, "my chest is going doki-doki". Keep in mind, "chest" is even more closely associated with "breasts" in Japanese than in English.