Currently you are able to watch "TONIKAWA: Over the Moon for You" streaming on Crunchyroll or for free with ads on Crunchyroll. It is also possible to buy "TONIKAWA: Over the Moon for You" as download on Apple TV, Amazon Video, Microsoft Store.
Nasa Yuzaki falls in love at first sight after an encounter with the mysterious Tsukasa. When Nasa earnestly confesses his feelings, she replies, "I'll date you, but only if we're married." Nasa and Tsukasa's cute and precious newlywed life of love is about to begin!