Lovesickness Freaks

If there is love, the age difference doesn't matter - that's a lie! Tsukiko-senpai's apparent age changes every day. Yesterday she was a high school girl. Today, she's a cute little kid. But tomorrow, she will be a mature, beautiful lady! Oyama, a young man who has feelings for Tsukiko, is puzzled by her ever-changing appearance. How old is the real Tsukiko? And no matter what she looks like, will he be able to carry on his unchanging love for her? A sci-fi love story by up-and-coming author Amagakure Gido! (Source: Kadokawa, translated)