Sore wa Himitsu desu
Kaneshiro Jou is a middle-aged man who has just been dumped by his lover when he is unexpectedly killed. Then it turns out that was a mistake, and he he gets to keep living - with a surprising twist in a parallel universe as a younger version of himself.
White & Black
Eiji and Kouki are angels whose mission is to guide souls to either heaven or hell. Eiji, a black angel, guides corrupted souls to hell, while Kouki, a white angel, guides pure souls to heaven. Both have to work together as partners to accomplish their task. However the dark angels are not reincarnated. So when the dark angel dies the white angel trades his wings and powers for the dark angel to be reincarnated again.
Imaginary Lovers
Ch. 1: Imaginary Lovers-A man reunites with his college love after three years only to find out that his thoroughly male love interest has apparently conceived, given birth to and raised a son in the three years since they parted. That this is anatomically possible doesn't even occur to our slightly dopey seme, who's just overjoyed at the prospect of getting back "the one that got away" plus a rather adorable half-sized extra. Ch. 2: Brothers-Two very different boys learn to co-exist when they suddenly find themselves living together and expected to act like brothers. Ch. 3: Supreme Logic Study-Two college students bask in domestic bliss after ten years of friendship, totally unaware of their true feelings for each other. Ch. 4: Twin-When Wataru dies in a traffic accident, he thinks he has no lingering attachments to the living world... if that's so, then why can't he pass on to his next incarnation? And what's keeping the sad-eyed boy who shares his lonely rooftop? Ch. 5: Bet-A bet turns into something much more infuriating. When a guy takes on a bet to make a antisocial guy with a expressionless face lose his cool. He ends up doing it but lies and gets his hair cut. Ch. 6: D.H-A boy is enlisted to write love letters for his less-than-literate best friend... unfortunately, the object of his friend's affection is his own secret crush.
500-nen No Itonami
Yamada Torao commits suicide after the loss of his lover and wakes up from suspended animation 250 years in the future. The android tasked with assisting him that treats him kindly and with tender care is the disappointing robot of his former lover at a "30% reduction".
The Mage Will Master Magic Efficiently In His Second Life
Zeff Einstein spent his whole life mastering red magic and was finally recognized for it, yet a new spell that was soon created revealed that his talent for red magic was his lowest. Bitter at the thought of all his wasted effort, he creates a spell to send his old self back in time to his younger body and together with the determined "genius" mage Milly and the handsome swords woman Claude, he intends to master magic more efficiently this time.
Yume Ni Tobu Tori