Seven Days Series by Venio Tachibana, Rihito Takarai

It is rumored that Touji Seryou, one of the more popular boys at school, would go out with anyone who asks him out on a Monday morning. But on this particular Monday morning, the first person he meets at the school gate is no other than Yuzuru Shino, Seryou’s senpai at the archery club. On a whim, and well-aware of Seryou’s reputation, Shino asks Seryou to go out with him... moreIt is rumored that Touji Seryou, one of the more popular boys at school, would go out with anyone who asks him out on a Monday morning. But on this particular Monday morning, the first person he meets at the school gate is no other than Yuzuru Shino, Seryou’s senpai at the archery club. On a whim, and well-aware of Seryou’s reputation, Shino asks Seryou to go out with him. Thinking that it will be treated as a joke, they’re both guys after all, imagine Shino’s surprise when Seryou takes him up on the offer! There is a catch, though. While Seryou does go out with the first girl who asks him out on a Monday morning, the other side of the coin is – by the end of the week, he will break up with that person. In essence, Seryou is a lover with a one-week expiration date. But will Shino prove to be the exception to that rule? less

Yuzuru asked Touji out as a half hearted joke, not expecting to be taken seriously. Touji accepted, and Yuzuru knew he was like the rest, relationship begun on a Monday, and dumped on the Sunday. What he did not expect was the feelings that went beyond friendship that emerged. It's now Friday, and the end is approaching. But is it? Yuzuru may be mourning the inevitable, but what about Touji? Friday begins the end, but Sunday reveals all.. moreYuzuru asked Touji out as a half hearted joke, not expecting to be taken seriously. Touji accepted, and Yuzuru knew he was like the rest, relationship begun on a Monday, and dumped on the Sunday. What he did not expect was the feelings that went beyond friendship that emerged. It's now Friday, and the end is approaching. But is it? Yuzuru may be mourning the inevitable, but what about Touji? Friday begins the end, but Sunday reveals all...The exciting conclusion to the popular boy's love manga by Tachibana Venio! less

The rules were clear: they could date for a week. But someone forgot to tell love!On a whim, high school third-year Yuzuru Shino asks out first-year Toji Seryo, who is notorious for being a weeklong lover—he’ll date the first girl to ask him out Monday morning and then promptly dump her by the following Monday! The boys start dating, and by Tuesday, the first inklings of attraction hit. Can Seryo put words to his feelings before Monday comes, or are old dating habits too hard to break?