Chapter 1: Story about two high school classmates who are dating. The uke sees the flight the seme is on crashed and there are no survivors. The seme arrives at the uke's house several days go by when the dems starts to fade away because they found his body. The seme promises to find him in the next life and it shows him finding the like 10 years later.
Chapter 2: Same couple from Chapter 1 is about the couple with the seme being a 16 year old high school student and the uke being a 34 year old school nurse.
Chapter 3: Same couple from Chapters 1 and 2 is about their first date since the seme's reincarnation for Christmas. Only problem is uke shows up with no body only his soul. The seme and their friend search for his body before he disappears and dies.
Chapter 4: The friend's story of the couple in previous chapters. After a portal opens to suck the uke into it the seme kicks the friend in instead. The friend ends up in the place where the souls go before going through the tunnel to he'll in a man's chest. The friend is stuck there for a while for the transfer of power through sex with hell guardian will take a while. The couple from previous chapters arrive and take the fire d back with them but he misses the hell guardian.
Chapter 5: Unrelated story to previous chapters. A chief tells a subordinate to stop having multiple partners and find someone he loves. The subordinate asks the chief to be his partner while he looks for someone to love. Several days later the subordinate is told he is transferring go New York branch overseas. The subordinate stops having sex with chief and starts flirting with other girl coworkers. The chief gets jealous and shows up at subordinates house after he quits and discovers they are in love.
Kimi ni Sasayaku Mirai