I was wondering the same!
yeah, i want to know that, too! i love yaoi stories with kids. hehehe
I just found that it's something from SUZUKURA Hal and I've found this: http://www.amazon.co.jp/%E3%81%8D%E3%81%BF%E3%81%AE%E7%9F%A5%E3%82%89%E3%81%AA%E3%81%84%E6%81%8B%E7%89%A9%E8%AA%9E-%E5%B9%BB%E5%86%AC%E8%88%8E%E3%83%AB%E3%83%81%E3%83%AB%E6%96%87%E5%BA%AB-%E6%9D%8E%E4%B8%98-%E9%82%A3%E5%B2%90/dp/4344825489/ref=sr_1_1?s=books&ie=UTF8&qid=1455677328&sr=1-1&keywords=%E3%81%8D%E3%81%BF%E3%81%AE%E7%9F%A5%E3%82%89%E3%81%AA%E3%81%84%E6%81%8B%E7%89%A9%E8%AA%9E
And that's all, I don't think it's translated or something;)
Does anyone know if the image on the last page is from a manga? I love ones with little kids in them (⌒▽⌒)