MANNERIXXX
Hikaru and Shima have been dating for 7 years and living together for 3. Hikaru feels like their love life has become complacent, so he tries to spice it up with the (sketchy) advice of his co-worker.
2-4. Souteigai Love Serendipity
Shimizu is tricked by his colleague, the flashy Karasuma, into going to what he thought was a party for old classmates, but turns out…