Manga by author Kubo Mitsurou - Status ongoing

After three unfulfilling years of high school, Imamura Kinichirou was finally graduating. Because of his delinquent-esque looks, he was feared by his classmates, has made no friends, and his greatest regret was not joining the ouendan (cheer club), which was now disbanded. After an accident on the day of his graduation, he and classmate Fujieda Aki are transported three years back in time, freshman again in body but with high-school memories intact. Can Imamura fix the mistakes of his past? Can he re-do his high school years in the way that he's always wanted? Again!! The universe suddenly shouts.

One day, Fujimoto, a 29-year-old temp worker (whose age equals the number of years he's lived without a girlfriend) suddenly receives a surge of calls and emails all at once from the women connected to his past. That's right, he's finally hit popularity, something which comes only once in a lifetime for everyone! Feeling elated, Fujimoto decides to meet them one after the otheror so the story goes.Nominated for the 3rd Manga Taisho Award (2010).

From Anime Waves:By all the usual measures, he could be considered a pretty useless guy: a scholastic failure, an athletic disaster, and a chronic loser...but Fukuda Shinichi has one passion: cheering for others!The 18-year-old captain of North Kanto Southern High's Cheerleading squad decides to make the most of his summer by attending cram school in Tokyo, only to find out that the whole trip was a sham! Things are looking up when he and his friend meet up with two cute Tokyo girls; too bad the girls brought them to a rip-off bar and took off! Ditched by his one remaining friend and stuck with an impossibly high bar bill, Fuku-kun's life couldn't get any worse!But just then he gets saved by Ume, his role model and former cheerleading squad captain! What is he doing in Tokyo...and why does everyone around seem to know and respect him? Without anywhere else to go, Fuku-kun decides follow Ume to his job, only to discover that...he's a host?!? Fukuda's summer of cheering others on has begun...and the streets of Tokyo's red-light district will never be the same!