I Can't Say That One Word

(from ebookjapan):
At the request of her friend Satsuki, the good-natured Tomoko goes to the home of Satoshi, Satsuki's fiancé, to tell him that she has called off their engagement unilaterally. However, Satoshi and his mother's mild-mannered personality makes it difficult for Tomoko to call off the engagement... In addition to the title story, which depicts delicate romantic feelings between a man and a woman, it also includes "Hoshikage no Hito," a unique jidaigeki about the youth of Soji Okita, and "Sweet Key, Bitter Key," about the sorrow of an workplace love affair.