Koi Wo Shimashou

From Half-Baked Scanlations:
1) Koi wo Shimashou (Let’s make Love)
Management consultant Kobayashi uses his work to pick up younger men who catch his eye. Unfortunately, on his latest project he finds himself stuck with morose middle-aged manager Chief Araki. Kobayashi’s initial horror develops into a professional respect that inspires him to use his easygoing charm to strike up an unlikely friendship.
2) Koi wo Kanjite
3) Dirt
Caught up in a bank robbery, middle-aged branch manager Nishio is engaged in a battle of wills with lead robber Kazuya: a laidback macho thug who knows his personal details and has a weakness for older men.
4) Ano Koro ni Modorenai
5) Mune Ippai no (Wholehearted)
Section Chief Shingo’s stress at work is spilling over into his private life. A cheerful security guard enters his life, but even he finds Shingo’s violent mood swings too much to handle.
6 Tsurete Itte Kure
7) Memorial Day
8) Manga Lesson