Fuufu Hajimemashita.

Seiichirou and Miya are a married couple who fell in love at first sight and got married on day 0. With almost no romantic experience, the couple has not yet been able to hug, kiss, or even have sex, even though it will soon be a year since they were married. They try to somehow progress their relationship before their wedding anniversary in three months, but... The story depicts their difficult newlywed life, full of "firsts." (Source: Natalie, translated)