Sengoku Hime Matsu Hime No Monogatari (Shueisha Mirai Bunko)

[Machine Translation] Matsuhime, the fifth daughter of Shingen Takeda, the famous general known as "Tiger of Kai", is betrothed to Nobutada Nobutada, the eldest son of Nobunaga Oda, at the age of seven. The two waited for the young Princess Matsu to grow up and nurtured their love for each other through correspondence, but when she was 12 years old, the alliance with Oda collapsed and the marriage was broken off. Matsuhime, who had been single-mindedly devoted to Nobutada, was devastated, but as if to drive home the point, the downfall of the Takeda clan was imminent.... From upper elementary school and junior high school.

「甲斐の虎」と謳われた名将・武田信玄の五女・松姫は、七歳で織田信長の嫡男・信忠と婚約する。祝言は幼い松姫の成長を待つことになり、二人は手紙のやりとりを通して、お互いの恋心を育てていくが、松姫が十二歳の時に織田との同盟は破綻し、破談となってしまう。信忠を一途に慕っていた松姫は味しみに暮れるが、追い討ちをかけるように武田氏の滅亡が迫っていた...。小学上級・中学から。